Interoperability Issues of the European Catalogue of Data Sources (CDS). - Ralf Kramer; Ralf Nikolai; Claudia Rolker; Sigfus Bjarnason; Stefan Jensen (MD, 1997)

WebCDS - A Java-based Catalogue System for European Environment Data. - Wassili Kazakos; Ralf Kramer; Ralf Nikolai; Claudia Rolker; Sigfus Bjarnason; Stefan Jensen (IADT, 1998)