Localización:Foundations of quantum physics: proceedings of the Workshop on Foundations of Quantum Physics held at Universidad de Cantabria, Santander, Spain, to celebrate the 65th anniversary of professor Emilio Santos, February 8-9, 2001 / Rafael Blanco Alcañiz (ed. lit.) , Ángel Mañanes Pérez (ed. lit.) , Saturnino Marcos Marcos (ed. lit.) , Luis Pesquera González (ed. lit.) , M. A. Rodríguez Díaz (ed. lit.) , 2002, ISBN 84-932150-3-1, págs. 15-29