1.
Beitr Sexualforsch
; 62: 105-14, 1987.
Article
in German
| MEDLINE
| ID: mdl-3675536
2.
Beitr Sexualforsch
; 62: 37-53, 1987.
Article
in German
| MEDLINE
| ID: mdl-3314858
3.
Beitr Sexualforsch
; 49: 23-38, 1970.
Article
in German
| MEDLINE
| ID: mdl-5538487