TY  - JOUR
AU  - P. A. Frolov
TI  - Topological structure of elliptic boundary problems in space
JO  - Funkcionalʹnyj analiz i ego priloženiâ
PY  - 1984
SP  - 81
EP  - 82
VL  - 18
IS  - 2
PB  - mathdoc
UR  - http://geodesic.mathdoc.fr/item/FAA_1984_18_2_a19/
LA  - ru
ID  - FAA_1984_18_2_a19
ER  -