2012:

• International:
  • "A Review of Si MOS-gated Power Switches and PiN Rectifiers". Automatika 53 (2012) 2, 117-127. DOI 10.7305/automatika.53-2.178, UDK 621.382.049.774.2, IFAC 4.6.2. J. Rebollo, I. Cortés, X. Perpiñà, J. Millán
  • "Enhanced power cycling capability of SiC Schottky diodes using press pack contacts". Microelectronics Reliability 52 (2012) 2250–2255. Authors: V. Banu, P. Godignon, X. Perpiñà, X. Jordà, J. Millán
  • "Thermal Behavior of SiC Power Diodes". ECS Transactions, 50 (3) 399-410 (2012) The Electrochemical Society. Authors: J. Millán, P. Godignon, X. Jordà, M. Berthou, V. Banu
  • "Wide Band Gap Semiconductor Devices for Power Electronics" Automatika 53 (2012) 2, 107-116. DOI 10.7305/automatika.53-2.177, UDK 621.315.5, IFAC 4.6.2. J. Millán, P. Godignon, A. Pérez-Tomás
    
  • "Effect of the Growth Conditions on the Properties of Nitrided Oxides Grown by RTP for 4H-SiC p-Channel MOSFETs Fabrication". Journal of The Electrochemical Society, 159 (5) H1-H6 (2012). 0013-4651/2012/159(5)/H1/6/$28.00 © The Electrochemical Society. Authors: A. Constant, M. Berthou, M. Florentin, J. Millán, P. Godignon
  • "Efficient and Linear Power Amplifier Based on Envelope Elimination and Restoration". IEEE Transactions on Power Electronics. Volume: 27, Issue: 1. Digital Object Identifier: 10.1109/TPEL.2011.2162005. Publication Year: 2012, Page(s): 5 - 9. Authors: Vasić, M. ; Garcia, O. ; Oliver, J.A. ; Alou, P. ; Diaz, D. ; Cobos, J.A. ; Gimeno, A. ; Pardo, J.M. ; Benavente, C. ; Ortega, F.J.
  • "Envelope Amplifier Based on Switching Capacitors for High-Efficiency RF Amplifiers". IEEE Transactions on Power Electronics. Volume: 27, Issue: 3. Digital Object Identifier: 10.1109/TPEL.2011.2163646. Publication Year: 2012, Page(s): 1359 - 1368. Authors: Vasić, M.; García, O.; Oliver, J.J.A.; Alou, P.; Diaz, D.; Prieto, R.; Cobos, J.A.
  • "Three-Level Cell Topology for a Multilevel Power Supply to Achieve High Efficiency Envelope Amplifier". IEEE Transactions on Circuits and Systems I: Regular Papers. Volume: 59, Issue: 9. Digital Object Identifier: 10.1109/TCSI.2012.2185307. Publication Year: 2012, Page(s): 2147 - 2160. Authors: Diaz, D. ; Vasic, M. ; Garcia, O. ; Oliver, J.A. ; Alou, P. ; Prieto, R. ; Cobos, J.A.
  • "Impact of N₂ Plasma Power Discharge on AlGaN/GaN HEMT Performance".  IEEE Trans. Electron Devices 59, 374-379 (2012). Authors: M.F. Romero, A. Jiménez, F. González-Posada Flores, S. Martín-Horcajo, F. Calle, E. Muñoz
  • "Vertical conduction mechanism of the epitaxial graphene / n-type 4H-SiC heterojunction at cryogenic temperatures". Appl. Phys. Lett. 100, 193506 (2012). Authors: M.J. Tadjer, T.J. Anderson, K.D. Hobart, L.O. Nyakiti, V.D. Wheeler, R.L. Myers-Ward, D.K. Gaskill, C.R. Eddy, Jr., F.J. Kub, F. Calle
    
  • “On the limit of the output capacitor reduction in power-factor correctors by distorting the line input current” . IEEE Transactions on Power Electronics , vol. 27, pp. 1168-1176, March 2012. Authors: D. Lamar, J. Sebastián, M. Arias, A. Fernández.
  • “Elimination of the transfer-time effects in line-interactive and passive standby UPSs by means of a small-size inverter”. IEEE Transactions on Power Electronics, vol. 27, pp. 1168-1176, March 2012. Authors: M. Arias, M. Hernando, D. Lamar, J. Sebastián, A. Fernández
  • “Design of a soft-switching asymmetrical half-bridge converter as second stage of an LED driver for street lighting application”. IEEE Transactions on Power Electronics, vol. 27, pp. 1608-1621, March 2012. Authors: M. Arias, D. Lamar, F. Linera, D. Balocco, A. Diallo, J. Sebastián
  • “A linear assisted DC/DC converter for envelope tracking and envelope elimination and restoration applications”. IEEE Transactions on Power Electronics, vol. 27, pp. 3302-3309, July 2012. Authors: P. Miaja, M. Rodríguez,  A. Rodríguez, J. Sebastián
  • "Average inductor current sensor for digitally-controlled switched-mode power supplies". IEEE Transactions on Power Electronics, Vol. 27, nº 8, agosto de 2012, pp. 3795-3806. Authors: M. Rodríguez, V. M. López, F. Azcondo, J. Sebastián, D. Maksimovic
  • "An overview of the ac-dc and dc-dc converters for LED lighting applications". Automatika, Vol. 53, nº 2, abril / junio  de 2012, pp. 156-172. Authors: M. Arias, A. Vázquez, J. Sebastián
  • "Tapped-inductor buck HB-LED ac-dc driver operating in boundary conduction mode for replacing incandescent bulb lamps". IEEE Transactions on Power Electronics, Vol. 27, nº 10, octubre de 2012, pp. 4329-4337. Authors: D. González, M. Fernández, M. Arias, M. Hernando, J. Sebastián
  • "Magnet Temperature Estimation in Surface PM Machines During Six-Step Operation". Industry Applications, IEEE Transactions on, vol.48, no.6, pp.2353-2361, Nov.-Dec. 2012. Authors: Reigosa, D.D.; Briz, F.; Degner, M.W.; Garcia, P.; Guerrero, J.M.
  • "Active Islanding Detection Using High-Frequency Signal Injection".  Industry Applications, IEEE Transactions on, vol.48, no.5, pp.1588-1597, Sept .-Oct. 2012. Authors: Reigosa, D.; Briz, F.; Charro, C.B.; Garcia, P.; Guerrero, J.M. 
  • "Harmonic Balance-based Control of a Boost DC/AC Converter". International Journal of Circuit Theory and Applications. Vol. 40, Nº 8, pp. 777-792. August 2012. DOI: 10.1002/cta.755. Authors: D. Biel, J.M. Olm, E. Fossas, M. Spinetti-Rivera
  • "Lyapunov-Based Control Scheme for Single-Phase Grid-Connected PV Central Inverters". IEEE Transactions on Control Systems Technology. Vol. 20, Nº 2, pp. 520-529. Marzo 2012. ISBN: 1063-6536. Authors: C. Meza, D. Biel, D. Jeltsema,  J.M.A. Scherpen
    
  • "Sensorless Sliding Mode Control of PMSM Drives Using a High Frequency Injection Algorithm". Przegląd Elektrotechniczny (Electrical Review). pp. 16-20. ISSN 0033-2097. 2012. Authors: V. Repecho, D. Biel, A. Arias
  • "Power MOSFET Technology Roadmap towards High Power Density Voltage Regulators for Next Generation Computer Processors". IEEE Transactions on Power Electronics, Vol 27, issue 4, April 2012, pp page(s): 2193 – 2203. Authors: Lopez, T.; Alarcon, E.
  • "A Ripple-Based Design-Oriented Approach for Predicting Fast-Scale Instability in DC–DC Switching Power Supplies". IEEE Transaction on Circuits and Systems I, vol 59, issue 1, Jan 2012, Page(s): 215 – 227. Authors: E. Rodriguez, A. El Aroudi, F. Guinjoan, E. Alarcón
  • "An Asynchronous Finite-State-Machine-based Buck-Boost Converter for On-Chip Adaptive Power Supply". Analog Integrated Circuits and Signal Processing, Springer Netherland, Oct 2012. Authors: D. Fernández, J. Madrenas, E. Alarcón
  • "On Multi-Level PWM and Asynchronous Modulations for Enhanced Bandlimited Signal Tracking in Switching Power Amplifier". Accepted to IEEE Transactions on Circuits and Systems – part I, August 2012. Authors: A. Garcia i Tormo, A. Poveda, E. Alarcón, F. Guinjoan
    
  • "RF Performance Projections of Graphene FETs vs. Silicon MOSFETs". ECS Solid State Letters, 1 (5) Q39-Q41 (2012). The Electrochemical Society Journals, August 29, 2012  (KTH / UPC). Authors: S. Rodriguez, , S. Vaziri, M. Ostling, A. Rusu, E. Alarcon, M.C. Lemme
  • "Graphene-based Nano-patch Antenna for Terahertz Radiation". Photonics and Nanostructures - Fundamentals and Applications, May 2012. Authors: Llatser, C. Kremers, A. Cabellos-Aparicio, J. M. Jornet, E. Alarcón, D. N. Chigrin
    
  • "Fast Transient Current-Steering CMOS LDO Regulator Based on Current Feedback Amplifier". The VLSI Journal on Integration, accepted Feb 2012. Authors: A. Saberkari, E. Alarcón, S. B. Shokouhi
  • "Output-Capacitorless CMOS LDO Regulator Based on an Embedded Current-Mode Capacitor Multiplier". IETE Technical Review, Nov 2012. Authors: R. Fathipour, A. Saberkari, H. Martinez, E. Alarcon
    
  • "Radiation Characteristics of Tunable Graphennas in the Terahertz Band". Radioengineering Journal, June 2012. Authors: Llatser, I., Kremers, C., Chigrin, D. N., Jornet, J. M., Lemme, M., Cabellos-Aparicio, A., Alarcón, E.
    
  • "Fuel cell emulator for oxygen excess ratio estimation on power electronics applications". Computers & Electrical Engineering, Volume 38, Issue 4, July 2012, Pages 926-937, ISSN 0045-7906, DOI: http://dx.doi.org/10.1016/j.compeleceng.2012.02.012. Authors: Restrepo, C.; Ramos-Paja, C.A.; Giral, R.; Calvente, J.; Romero, A
  • "A Review of the Main Power Electronics’ Advances in Order to Ensure Efficient Operation and Durability of PEMFCs". Automatika, 53(2), 184–198(2012), DOI:http://dx.doi.org/10.7305/automatika.53-2.192. Authors: C. Restrepo, T. Konjedic, J. Calvente, R. Giral
    
  • "Current-Mode Control of a Coupled-Inductor Buck–Boost DC–DC Switching Converter". IEEE Transactions on Power Electronics, vol.27, no.5, pp.2536-2549, May 2012 doi: http://dx.doi.org/10.1109/TPEL.2011.2172226. Authors: Restrepo, C.; Calvente, J.; Romero, A.; Vidal-Idiarte, E.; Giral, R
    
  • "Analysis of a Self-Oscillating Bidirectional DC–DC Converter in Battery Energy Storage Applications". Power Delivery, IEEE Transactions on , vol.27, no.3, pp.1292-1300, July 2012. doi: http://dx.doi.org/10.1109/TPWRD.2012.2192455. Authors: Barrado, J.A.; El Aroudi, A.; Valderrama-Blavi, H.; Calvente, J.; Martinez-Salamero, L.
    
  • "Reactivation System for Proton-Exchange Membrane Fuel-Cells". Energies 2012, 5(7), 2404-2423; doi:10.3390/en5072404. Authors: Restrepo, C.; Avino, O.; Calvente, J.; Romero, A.; Milanovic, M.; Giral, R.
    
  • "Dynamic Model of Class-E Inverter with Multifrequency Averaged Analysis". Industrial Electronics, IEEE Transactions on 59, no. 10 (2012): 3737-44. Authors: Bernal, C., E. Oyarbide, P. Molina, A. Mediano
  • "Tm-Te Decomposition of Power Losses in Multi-Stranded Litz-Wires Used in Electronic Devices". Progress In Electromagnetic Research 123 (2012): 83-103. Authors: Carretero, C., J. Acero, R. Alonso
    
  • "Frequency-Dependent Modelling of Domestic Induction Heating Systems Using Numerical Methods for Accurate Time-Domain Simulation". IET Power Electronics PP, no. 99 (2012): 1-1. Authors: Carretero, C., O. Lucia, J. Acero, R. Alonso, J.M. Burdio
    
  • "Computational Modeling of Two Partly-Coupled Coils Supplied by a Double Half-Nridge Resonant Inverter for Induction Heating Appliances". IEEE Transactions on Industrial Electronics PP, no. 99 (2012): 1-1. Authors: Carretero, C., O. Lucia, J. Acero, J.M. Burdio
    
  • "Fpga-Based Test-Bench for Resonant Inverter Load Characterization". Industrial Informatics, IEEE Transactions on PP, no. 99 (2012): 1-1. Authors: Jimenez, O., O. Lucia Gil, L. Barragan, D. Navarro, J. Artigas, I. Urriza
    
  • "Multiple-Output Resonant Matrix Converter for Multiple Induction Heaters". Industry Applications, IEEE Transactions on PP, no. 99 (2012): 1-1. Authors: Lucia Gil, O., C. Carretero, J. Burdio, J. Acero, F. Almazan
    
  • "Optimal Gate Drive Circuit Design for Zvs Operation of Sic-Jfet Devices". Electronics Letters 48, no. 25 (2012): 1621-22. Authors: Sarnago, H., J. M. Burdío, A. Mediano, O. Lucia
    
  • "High Efficiency Ac-Ac Power Electronic Converter Applied to Domestic Induction Heating". Power Electronics, IEEE Transactions on 27, no. 8 (2012): 3676-84. Authors: Sarnago, H., A. Mediano, O. Lucia

2011:

• International:
  • “Analysis of Clamped Inductive Turn-off Failure in Railway Traction IGBT Power Modules under Overload Conditions”. IEEE Transactions on Industrial Electronics (ISSN: 0278-0046), Vol. 58, pp. 2706-2714, 2011. Authors: X. Perpiñà, J.F. Serviere, I. Cortes, X. Jordà, S. Hidalgo, J. Urresti-Ibañez, J. Rebollo, M. Mermet-Guyennet
  • “Long-Term Reliability of Railway Power Inverters Cooled by Heat Pipe-based Systems”. IEEE Transactions on Industrial Electronics (ISSN: 0278-0046), Vol. 58, pp. 2662-2672, 2011. Authors: X. Perpiñà, X. Jordà, M. Vellvehi, J. Rebollo, M. Mermet-Guyennet
  • “Low-cost and versatile thermal test chip for power assemblies assessment and temperature measurement calibration purposes”. Applied Thermal Engineering (ISSN: 0017-9310), on-line. DOI:10.1016/j.applthermaleng.2011.02.008, 2011 Authors: X. Jordà, X. Perpiñà, M. Vellvehi, F. Madrid, D. Flores, S. Hidalgo
  • “Hot Spot analysis in integrated circuits by substrate laser mirage effect”. Applied Physics Letters, 98, 164104 (ISSN: 0003-6951), Apr 2011. Authors: X. Perpiñà, X. Jordà, M. Vellvehi, J. Altet
  • “Irradiance-based emissivity correction in infrared thermography for electronic applications”. Review of Scientific Instruments. DOI:10.1063/1.3657154, Nov 2011. Authors: M. Vellvehi, X. Perpiñà, G.L. Lauro, F. Perillo and X. Jordà
  • “Source and drain resistances as a function of T in AlGaN/GaN HEMTs”. Solid State Electronics 63, 184-188, 2011. Authors: R. Cuerdo, F. Calle
  • “Temperature and time dependent threshold voltage characterization of AlGaN/GaN high electron mobility transistors”. Physica Status solidi c 8, 2232-2234, 2011. Authors: M.J. Tadjer, R. Cuerdo, T. J. Anderson, K. D. Hobart, S. Martín-Horcajo, F. Calle
  • “A Novel Adaptive Synchronous Rectification System for Low Output Voltage Isolated Converters”. IEEE Transactions on Industrial Electronics, Vol. 58, pp. 3511-3520, 2011. Authors: Rodríguez, M.; Lamar, D. G.; Pérez de Azpeitia, M. A.; Prieto, R.; Sebastián, J.
  • “Temperature Issues in Saliency-Tracking-Based Sensorless Methods for PM Synchronous Machines”. IEEE Transactions on Industry Applications. Clave: A, Vol: 47, nº 3, Pág: 1352-1360. ISSN: 0093-9994, May 2011. Authors: Reigosa, D.D.; Briz, F.; Degner, M.W.; Garcia, P.; Guerrero, J.M.
  • "Rotor Position Estimation: A Review of High Frequency Methods". IEEE Industrial Electronics Magazine. Clave: A, Vol: 5, nº 2, Pág: 24-36. ISSN: 1932-4529, Jun 2011. Authors: Briz, F.; Degner, M.W.
  • “Impact of Saturation, Current Command Selection, and Leakage Flux on the Performance of Sensorless-Controlled Three-Pole Active Magnetic Bearings”. IEEE Transactions on Industry Applications. Clave: A, Vol: 47, nº 4, Pág: 1732-1740. ISSN: 0093-9994, Jul 2011. Authors: Garcia, P.; Guerrero, J.M.; El-Sayed Mahmoud, I.; Briz, F.; Reigosa, D.D.
  • "Common Mode EMI Model for a Direct Matrix Converter". IEEE Transactions on Industrial Electronics, vol.58, no.11, pp.5049-5056, doi: 10.1109/TIE.2011.2158774, Nov 2011. Authors: Espina, J.; Balcells, J.; Arias, A.; Ortega, C.
  • “Fundamental Modulation Limits for Minimum Switching Frequency Inband-Error-Free High-Efficiency Power Amplifiers”. IEEE Transactions on Circuits and Systems – part I, Vol 58, nº 10, pp. 2543-2555. Jan 2011. Authors: Albert Garcia Tormo, Alberto Poveda, Eduard Alarcón, and Francesc Guinjoan
  • “A Frequency Domain Approach for Controlling Chaos in Switching Converters”. IEEE Transactions on Circuits and Systems – part I, pp. 2928-2931. Mar 2011. Authors: E. Rodriguez, H.H.C. Iu, E. Alarcon, and A. El Aroudi
  • “Energy-Balance Control of PV Cascaded Multilevel Grid-Connected inverters for Level-Shifted and Phase-Shifted PWM Modulations”. IEEE Trans. on Industrial Electronics, Aug 2011. Authors: J. Chavarría, D. Biel, F. Guinjoan, C. Meza, JJ. Negroni
  • "A bidirectional multilevel boost-buck dc-dc converter". IEEE Trans. Power Electron., vol. 26, pp. 2172-2183, Aug 2011. Authors: S. Busquets-Monge, S. Alepuz, and J. Bordonau
  • "A multilevel active-clamped converter topology - Operating principle". IEEE Trans. Industrial Electron., vol. 58, pp. 3868-3878, Sep. 2011. Authors: S. Busquets-Monge and J. Nicolas-Apruzzese
  • Topologies and control of a class of single inductor multiple-output converters operating in continuous conduction mode". IET Power Electronics, vol.4, no.8, pp.927-935, September 2011. doi: http://dx.doi.org/10.1049/iet-pel.2010.0255. Benadero, L.; Moreno-Font, V.; Giral, R.; El Aroudi, A
  • "A Noninverting Buck–Boost DC–DC Switching Converter With High Efficiency and Wide Bandwidth". IEEE Transactions on Power Electronics, vol.26, no.9, pp.2490-2503, doi: 10.1109/TPEL.2011.2108668, Sept. 2011. Authors: Restrepo, C.; Calvente, J.; Cid-Pastor, A.; Aroudi, A.E.; Giral, R.
  • "Interleaved Converters Based on Sliding-Mode Control in a Ring Configuration". IEEE Transactions on Circuits and Systems I, vol.58, no.10, pp.2566-2577, Oct. 2011. Authors: Pastor, A.; Giral, R.; Calvente, J.; Utkin, V.I.; Martinez-Salamero, L.
  • "Coupling impedance between planar coils inside a layered media". Progress In Electromagnetic Research, vol. 112, pp. 381-396, 2011. Authors: C. Carretero, R. Alonso, J. Acero, and J. M. Burdío
  • "An application of the impedance boundary condition for the design of coils used in domestic induction heating systems". The International Journal for Computation and Mathematics in Electrical and Electronic Engineering (COMPEL), vol. 30, pp. 1616-1625, 2011. Authors: C. Carretero, O. Lucia, J. Acero, R. Alonso, and J. M. Burdio
  • "Configurable snubber network for efficiency optimization of resonant converters applied to multi-load induction heating". Electronics Letters, vol. 47, pp. 989-991, August 2011. Authors: O. Lucía, C. Carretero, D. Palacios, D. Valeau, and J. M. Burdío
  • "Application of the Green's function to calculating the impedance of a uniform current density between two multilayered media". Progress in Electromagnetic Research Online, vol. 7, pp. 241-245, March 2011. Authors: J. Acero, C. Carretero, R. Alonso, O. Lucía, and J. M. Burdío
  • "Dissipative losses evaluation in magnetic power devices with litz-wire type windings". Progress in Electromagnetic Research Online, vol. 7, pp. 246-250, March 2011. Authors: C. Carretero, R. Alonso, J. Acero, O. Lucía, and J. M. Burdío
  • A versatile power electronics test-bench architecture applied to domestic induction heating". IEEE Transactions on Industrial Electronics, vol. 58, pp. 998-1007, March 2011. O. Lucía, L. A. Barragán, J. M. Burdío, O. Jiménez, D. Navarro, and I. Urriza
  • Real-time FPGA-based hardware-in-the-loop simulation test-bench applied to multiple output power converters". IEEE Transactions on Industry Applications, vol. 47, pp. 853-860, March / April 2011. O. Lucía, I. Urriza, L. A. Barragan, D. Navarro, O. Jiménez, and J. M. Burdío
  • Phase-shift control of dual half-bridge inverter feeding coupled loads for induction heating purposes". Electronics Letters, vol. 47, pp. 670-671, May 2011. C. Carretero, O. Lucía, J. Acero, and J. M. Burdío
  • Series resonant inverter with selective harmonic operation applied to all-metal domestic induction heating". IET Power Electronics, vol. 4, pp. 587-592, May 2011. I. Millán, J. M. Burdío, J. Acero, O. Lucía, and S. Llorente
  • Analysis and modeling of planar concentric windings forming adaptable-diameter burners for induction heating appliances". IEEE Transactions on Power Electronics, vol. 26, pp. 1546-1558, May 2011. J. Acero, C. Carretero, I. Millán, O. Lucía, R. Alonso, and J. M. Burdío
  • Series resonant multi-inverter with discontinuous-mode control for improved light-load operation". IEEE Transactions on Industrial Electronics, vol. 58, pp. 5163-5171, November 2011. O. Lucía, J. M. Burdío, L. A. Barragán, J. Acero, and C. Carretero

2010:

• International:
  • “Analysis of Excess Carrier Concentration Control in Fast-Recovery High-Power Bipolar Diodes at Low Current Densities". Journal of the Electrochemical Society (ISSN: 0013-4651), Vol. 7, pp. H711-H720, 2010. X. Perpiñà, X. Jordà, M. Vellvehi, J. Vobecký, N. Mestres
  • Location of Hot Spots in Integrated Circuits by Monitoring the Substrate Thermal Phase-Lag with the Mirage Effect". Optics Letters (ISSN:0146-9592), Vol. 35, pp. 2657-2659, 2010. X. Perpiñà, J. Altet, X. Jordà, M. Vellvehi, N. Mestres
  • Low-cost trench isolation technique for Reverse Blocking IGBT using Boron Nitride doping wafers". Microelectronics Engineering, Vol. 87, pp. 2323–2327, 2010. M. Vellvehi, J.L. Galvez, X. Perpiñà, X. Jordà, P. Godignon and J. Millán
  • A low-cost high power factor battery charger based on standard peak-current mode integrated controllers". European Power Electronics and Drives Journal, Vol. 20, nº 4, diciembre de 2010, pp. 12-21. D. González, J. Sebastian, M. Arias, A. Rodríguez, M.M. Hernando
  • Resonant inverter topologies for three concentric planar windings applied to domestic induction heating". Electronics Letters, vol. 46, pp. 1225-1226, 2010. I. Millán, J. M. Burdío, J. Acero, O. Lucía, D. Palacios
  • Efficiency-oriented design of ZVS half-bridge series resonant inverter with variable frequency duty cycle control". IEEE Transactions on Power Electronics, vol. 25, pp. 1671-1674, July 2010. O. Lucía, J. M. Burdío, I. Millán, J. Acero, and L. A. Barragán
  • Series-resonant multiinverter for multiple induction heaters". IEEE Transactions on Power Electronics, vol. 24, pp. 2860-2868, November 2010. O. Lucía, J. M. Burdío, L. A. Barragán, J. Acero, and I. Millán