2

3
by Neunzert, H., Eschmann, Winfried G., Blickensdörfer-Ehlers, Arndt, Schelkes, Klaus
Published 1996
Springer Berlin Heidelberg

4
by Eschmann, Winfried G., Blickensdörfer-Ehlers, Arndt, Schelkes, Klaus
Published 1998
Springer Berlin Heidelberg