TY  - BOOK
AU  - Gelfand, I. M. 
AU  - Fomin, S. V.
AU  - Silverman, Richard A.
TI  - Calculus of variations
U1  - 515.64 
PY  - 1963///
CY  - Englewoodcliffs
PB  - Prentice Hall
KW  - Calculus of variations
ER  -