@book{8751,
	author = {Fraenkel, Abraham A. and Yehoshua, Bar-Hillel},
	title = {Foundations of set theory},
	publisher = {North-Holland,},
	year = {1973 (Rep. 1984)},
	series = {Studies in Logic and foundation of Mathematics},
	address = {Amsterdam:},
	edition = {2nd.}
}