@book{9770,
	author = {Riggs, James L. and Inoue, Michael S. and Inoue, Michael S. ; jt. auth.},
	title = {Introduction to operations research and management science; a general systems approach},
	publisher = {McGraw-Hill},
	year = {1975},
	series = {McGraw-Hill series in Industrial Engineering and Management Science},
	address = {New York}
}