TY  - JOUR
TI  - Sessions of the Petrovskii Seminar on differential equations and mathematical problems of physics
JO  - Trudy Matematicheskogo Instituta imeni V.A. Steklova
PY  - 1987
VL  - 42
IS  - 5
PB  - mathdoc
UR  - http://geodesic.mathdoc.fr/item/RM_1987_42_5_a20/
LA  - ru
ID  - RM_1987_42_5_a20
ER  -