by Hans R. Koelz, Claude Muller, Stefan Müller-Lissner
1996
by Stefan Müller-Lissner, Hans R. Koelz
1990
by Piero Scalfaro, Hans R. Koelz, Andre L. Blum
1991
by Peter Bauerfeind, Remy Meier, Christoph Beglinger, Hans R. Koelz, M. Krebser
1994
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