Classification and Data Analysis Theory and Application Proceedings of the Biannual Meeting of the Classification Group of Società Italiana di Statistica (SIS) Pescara, July 3–4, 1997 Vichi Maurizio Heftet / 1999 / Engelsk
Exploratory Data Analysis in Empirical Research Proceedings of the 25th Annual Conference of the Gesellschaft für Klassifikation e.V., University of Munich, March 14–16, 2001 Schwaiger Manfred Heftet / 2002 / Engelsk
Information and Classification Concepts, Methods and Applications Proceedings of the 16th Annual Conference of the “Gesellschaft für Klassifikation e.V.” University of Dortmund, April 1–3, 1992 Opitz Otto Heftet / 1993 / Engelsk
