@article {15212,
	title = {A primal-dual parallel approximation technique applied to weighted set and vertex covers},
	journal = {Journal Algorithms},
	volume = {17},
	year = {1994},
	month = {1994///},
	pages = {280 - 289},
	author = {Khuller, Samir and Vishkin, Uzi and Young,N.}
}
