TY  - BOOK
AU  - ELSGOLTS, L ELSGOLTS, L
TI  - DIFFERENTIAL EQUATIONS AND THE CALCULUS OF VARIATIONS
U1  - 515.35/ELS/DIF 
PY  - 1970///
CY  - MOSCOW
PB  - MIR PUBLISHERS
KW  - DIFFERENTIAL EQUATIONS
KW  - MATHEMATICS
ER  -