TY  - JOUR
AU  - D. B. Kikin
TI  - Extremal properties of the solutions of certain classes of second-order partial differential equations and their applications to gas flows
JO  - Izvestiâ vysših učebnyh zavedenij. Matematika
PY  - 1963
SP  - 56
EP  - 58
IS  - 5
PB  - mathdoc
UR  - http://geodesic.mathdoc.fr/item/IVM_1963_5_a8/
LA  - ru
ID  - IVM_1963_5_a8
ER  -