TY  - JOUR
TI  - Joint sessions of the Petrovskii Seminar on differential equations and mathematical problems of physics and of the Moscow Mathematical Society (ninth meeting, January 20–23, 1986)
JO  - Trudy Matematicheskogo Instituta imeni V.A. Steklova
PY  - 1986
VL  - 41
IS  - 4
UR  - http://geodesic.mathdoc.fr/item/RM_1986_41_4_a12/
LA  - ru
ID  - RM_1986_41_4_a12
ER  -