@article{MZ_1996__222_3_174895, author = {J. B\"user}, title = {The multiplier-series of a {Schottky} group.}, journal = {Mathematische Zeitschrift}, pages = {465--478}, publisher = {mathdoc}, volume = {222}, number = {3}, year = {1996}, zbl = {0869.30036}, url = {http://geodesic.mathdoc.fr/item/MZ_1996__222_3_174895/} }