1.
Z Naturforsch B
; 23(2): 225-8, 1968 Feb.
Article
in German
| MEDLINE
| ID: mdl-4385978
2.
Z Naturforsch B
; 23(2): 228-35, 1968 Feb.
Article
in German
| MEDLINE
| ID: mdl-4385979
3.
Brookhaven Symp Biol
; 19: 161-8, 1966.
Article
in English
| MEDLINE
| ID: mdl-5966905