@book{9819,
	author = {Hammer, Peter L. and Rudeanu, Sergiu and Rudeanu, Sergiu},
	title = {Boolean methods in operations research and related areas; with a preface},
	publisher = {Springer-Verlag,},
	year = {1968},
	series = {Econometrics and Operations Research, v.7},
	address = {Berlin:}
}