Journal article (2001) - JM Gaspar-Escribano (author) , Jan‐Diederik van Wees (author) , M ter Voorde (author) , SAPL Cloetingh (author) , E. Roca (author) , A Cabrera (author) , JA Munoz (author) , P. Ziegler (author) , D Garca-Castellano (author)