TY  - BOOK
AU  - ELSGOLTS, L.
AU  - YANKOVSKY, G (tr.)
TI  - Differential equations and the calculus of variations
U1  - MATH 515.35 &.64 
PY  - 1970///
CY  - Moscow
PB  - MIR
KW  - CALCULUS OF VARIATIONS
KW  - FUNCTIONS
KW  - DIFFERENCIAL EQUATIONS
ER  -