@book{15055,
	author = {Colloquium on Mathematics and Cybernetics in the Economy, Berlin, Oct. 1964. and Ivanescu, Petru I. ; ed.},
	title = {Pseudo-boolean programming and applications, papers presented at the colloquium},
	publisher = {Springer-Verlag},
	year = {1965},
	address = {Berlin}
}