TY  - BOOK
AU  - Gelfand,I.M.
AU  - Fomin, S.V.
TI  - Calculus of variations
SN  - 9780486414485
U1  - 515.64 
PY  - 2000///
CY  - New york
PB  - Dover Publications
KW  - Calculus of variations
KW  - Mathematics
ER  -