TY  - JOUR
AU  - S. F. Morozov
TI  - Necessary conditions for the extremum of two-dimensional variational problems on a~collection of discontinuous functions
JO  - Izvestiâ vysših učebnyh zavedenij. Matematika
PY  - 1972
SP  - 55
EP  - 63
IS  - 1
PB  - mathdoc
UR  - http://geodesic.mathdoc.fr/item/IVM_1972_1_a6/
LA  - ru
ID  - IVM_1972_1_a6
ER  -