1
by Blum, E., Oettli, W.
Published 1975
Springer Berlin Heidelberg

2
by Künzi, H.P., Oettli, W.
Published 1969
Springer Berlin Heidelberg

3
Published 1976
Springer Berlin Heidelberg
Other Authors: ...Oettli, W....

4
Published 1975
Springer Berlin Heidelberg
Other Authors: ...Oettli, W....

5
Published 1978
Springer Berlin Heidelberg
Other Authors: ...Oettli, W....

6
Published 1981
Springer Berlin Heidelberg
Other Authors: ...Oettli, W....