TY  - BOOK
AU  - Leitmann,G
TI  - Calculus of variations & optimal control: introduction
T2  - Mathematical concepts & methods in science & engineering 24
SN  - 0306407078
U1  - 4.13+15.04 
PY  - 1981///
CY  - New York
PB  - Plenum Press
ER  -