Proceedings article published in 1999 by Jordi Isern, Eduardo Bravo, Jordi Gómez-Gomar, Margarida Hernanz, Enrique Garcı́a-Berro, Franco Giovannelli, Cesare D. La Padula, Lola Sabau, Jordi Gutiérrez, Jordi José, Domingo Garcı́a-Senz, Joan Bausells, Joan Cabestany, Jordi Madrenas, Manuel Angulo and other authors. Jordi Isern, Eduardo Bravo, Jordi Gómez-Gomar, Margarida Hernanz, Enrique Garcı́a-Berro, Franco Giovannelli, Cesare D. La Padula, Lola Sabau, Jordi Gutiérrez, Jordi José, Domingo Garcı́a-Senz, Joan Bausells, Joan Cabestany, Jordi Madrenas, Manuel Angulo, Manuel Fernández-Valbuena, Erardo Herrera, Manuel Reina, Antonio Talavera

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