Córcoles-Ortega, J., and M. Salazar-Palma,  "Self-adaptive algorithms based on h-refinement applied to finite element method",  Antennas and Propagation Society International Symposium, 2005 IEEE, vol. 4B, pp. 197-200 vol. 4B, July, 2005.

Taha-Ahmed, B., M. Calvo-Ramon, and L. de Haro-Ariet,  "Down-link analysis of a FDSS-GSM overlay system",  Vehicular Technology Conference, 2004. VTC 2004-Spring. 2004 IEEE 59th, vol. 5, pp. 2502-2506, May, 2004.