TY  - BOOK
AU  - Krasnov M L
AU  - Kiselev A I
AU  - Makarenko G I
AU  - Yankovsky George
TI  - Problems and exercises in the calculus of variations
U1  - 515.64 
PY  - 1975///
CY  - Moscow
PB  - Mir
KW  - Calculus of variations
ER  -