1. V. Martínez, R. Lizundia, J.C. Jimeno. Proceedings of the 11th EC PVSEC, Montreaux, 1992, pp. 314–317.
2. M. Haouari-Merbah, I. Tobías, J.M. Ruiz. Proceedings of the 4th CDE, Barcelona, 2003, pp. III.11.1–III.11.4.
3. E. Van Kerschaver, R. Einhaus, J. Szlufcik, J. Nijs, R. Mertens. Proceedings of the 14th EC PVSEC, Barcelona, 1997, pp. 2438–2441.
4. A.R. Burgers, J.A. Eikelboon, A. Schönecker, W.C. Sinke, Proceedings of the 25th IEEE PVSC, Washington, 1996, pp. 569–572.
5. Carlos Sánchez del Río, “Análisis de Errores”. Eudema, Edición de la Universidad Complutense, S.A., Madrid,1989.