TY  - BOOK
AU  - Gelfand, Izrail Moiseevich
AU  - Fomin, S. V.
TI  - Calculus of variations
U1  - 517.4 
PY  - 1963///
CY  - Englewood Cliffs
PB  - Prentice-Hall
KW  - Calculus of variations
ER  -