TY  - BOOK
AU  - Gelfand, I. M.
AU  - Fomin, S. V.
AU  - Silverman, Richard A. [tr. & ed.]
TI  - Calculus of variations
SN  - 9780486414485
U1  - 515.64 
PY  - 2000///
CY  - New York
PB  - Dover Publications
KW  - Calculus of variations
N1  - Originally published: Englewood Cliffs, N.J. : Prentice-Hall, 1963
ER  -