@book{8924,
	author = {Lubotzky, Alexander},
	title = {Discrete groups, expanding graphs and invariant measures},
	publisher = {Birkhauser,},
	year = {1994},
	series = {Ferran Sunyer i Balaguer award winning monograph},
	address = {Basel:},
	note = {"Appendix by Jonathan D. Rogawski".}
}