TY  - BOOK
AU  - El-hawary M E
AU  -  Christensen G S
TI  - Optimal economic operation of electric power systems
T2  - Mathematics in science and engineering: A series of monograph and textbooka; 142
U1  - D66,2:(B), L9 
PY  - 1979///
CY  - New York 
PB  - Academic Press     
KW  - Transmission
ER  -