TY  - BOOK
AU  - Elsgolc, Lev D. 
TI  - Calculus of variations
SN  - 9780486457994
U1  - 515.64 El76c 
PY  - 2007///
CY  - New York 
PB  - Dover Publications, Inc.
KW  - Calculus of variations
KW  - Mathematics
ER  -