H. Calleja*, "An Approach to Amplifier Frequency Compensation", IEEE Transaction on Education, Vol.86, No. 1, February 2003, pp. 43-49 ISSN: 0018-9359
M.A. Contreras°, H. Calleja*, V.M. Cárdenas, "Experimental Assessment of the Non-Characteristic Harmonics Generated by Adjustable Speed Drives2, European Power Electronics Journal, Vol. 13, No. 2, March-April-May 2003, pp. 46-51
Morales-Villanueva, Amín de Jesús, García-Hernández, Carlos Felipe "Optimización del Desempeño del Sistema IP Móvil", Revista Iberoamericana Computación y Sistemas, Vol. 7, No. 1, Julio-Septiembre 2003, pp. 29-39
Gracida-Aguirre, M. & H. Calleja*, "Voltage Monitoring Instrument with Fast-Transients Capture Capability", Journal of Applied Research and Technology. Vol. 1, No. 3, October 2003, pp. 194-202. Centre of Applied Sciences and Technological Development, UNAM, México