TY  - BOOK
AU  - Gelfand, I. M.
AU  - Fomin, S. V.
TI  - Calculus of variations
SN  - 9780486414485
U1  - 517.97 
PY  - 2000///
CY  - New York
PB  - Dover
KW  - CALCULUS OF VARIATIONS
KW  - MIXED PROBLEMS
KW  - RITZ'S METHOD
ER  -