1
by Betge, Peter
Published 1998
Gabler Verlag

2
by Betge, Peter
Published 1995
Gabler Verlag

3
by Betge, Peter
Published 1996
Springer Berlin Heidelberg

4
by Betge, Peter
Published 1983
Gabler Verlag

5
by Betge, Peter
Published 1988
Gabler Verlag