TY  - JOUR
TI  - Joint sessions of the Petrovskii Seminar on differential equations and mathematical problems of physics and of the Moscow Mathematical Society
JO  - Trudy Matematicheskogo Instituta imeni V.A. Steklova
PY  - 1981
VL  - 36
IS  - 4
PB  - mathdoc
UR  - http://geodesic.mathdoc.fr/item/RM_1981_36_4_a7/
LA  - ru
ID  - RM_1981_36_4_a7
ER  -