@book{23824,
	author = {Lubotzky, Alexander and Segal, Dan and Segal, Dan ; jt. auth.},
	title = {Subgroup growth},
	publisher = {Birkhauser Verlag},
	year = {2003},
	series = {Progress in Mathematics },
	address = {Boston},
	note = {"Ferran Sunyer i Balaguer award winning monograph"}
}