1
by Freuler, Franz, Wiedmer, Ulrich, Bianchini, Domizio
Published 1986
Springer Berlin Heidelberg

2
by Wiedmer, Ulrich, Freuler, Franz, Bianchini, Domizio
Published 1976
Springer Berlin Heidelberg

3
by Gächter, Andre, Freuler, Franz, Nidecker, Andreas, Gückel, Claudius
Published 1996
Springer Berlin Heidelberg