TY  - BOOK
AU  - Elsgolc L.E.
TI  - Calculus of variations
T2  - Pure and applied mathematics
SN  - 0050016210
U1  - 515.64 23
PY  - 1961/// [reprinted 1963]
CY  - London
PB  - pergamon press
KW  - Calculus of variations
N1  - Include index
ER  -