TY  - JOUR
AU  - P. A. Frolov
TI  - Topological structure of normally solvable first boundary-value problems in the plane
JO  - Funkcionalʹnyj analiz i ego priloženiâ
PY  - 1979
SP  - 60
EP  - 70
VL  - 13
IS  - 3
PB  - mathdoc
UR  - http://geodesic.mathdoc.fr/item/FAA_1979_13_3_a6/
LA  - ru
ID  - FAA_1979_13_3_a6
ER  -