TY  - BOOK
AU  - Petrov Iu P
TI  - Variational methods in optimum control theory
T2  - Mathematics in Sciecne and Engineering Series of Monographs and Text Books, ed by Richard Bellman, 45
U1  - B7:3, K8 
PY  - 1968///
CY  - London
PB  - Academic press         
KW  - Optimization
ER  -