@book{16700,
	author = {Lang, Serge and Trotter, Hale},
	title = {Frobenius distributions in GL2-extensions; distribution of frobenius automorphisms in GL2-extensions of the rational numbers},
	publisher = {Springer-Verlag,},
	year = {1976},
	series = {Lecture notes in Mathematics},
	address = {Berlin:}
}