TY  - BOOK
AU  - Gelfand, I. M.
AU  - Fomin, S. V.
AU  - Silverman, Richard A.
TI  - Calculus of variations
T2  - Selected Russian publications in Mathematical Sciences
U1  - 515.64 
PY  - 1963///
CY  - New Jersey
PB  - Prentice-Hall
ER  -