TY  - BOOK
AU  - Gelfand, I. M.
AU  - Fomin, S. V.
TI  - Calculus of variations
SN  - 9780486414485
CY  - Mineola, N.Y.
KW  - Calculus of variations. ;  General Variation ;  Variational Problems & Integrals
N1  - Includes bibliographical references and index
ER  -