1.
Vrach Delo
; (5): 68-72, 1978 May.
Article
in Russian
| MEDLINE
| ID: mdl-676278
2.
Vrach Delo
; (3): 73-6, 1976 Mar.
Article
in Russian
| MEDLINE
| ID: mdl-1274323
3.
Vutr Boles
; 15(1): 77-8, 1976.
Article
in Bulgarian
| MEDLINE
| ID: mdl-1266187