@book{9523,
	author = {Sherali, Hanif D. and Shetty, C. M. and Shetty, C. M. ; jt. auth.},
	title = {Optimization with disjunctive constraints},
	publisher = {Springer-Verlag},
	year = {1980},
	series = {Lecture notes in Economics and Mathematical systems},
	address = {Berlin}
}