@book{11917,
	author = {Berg, Christian and Others and Christensen, Jens Peter Reus ; jt. auth.},
	title = {Harmonic analysis on semigroups; theory of positive definite and related functions},
	publisher = {Springer-Verlag},
	year = {1984},
	series = {Graduate texts in Mathematics},
	address = {New York}
}