@article{1077296368, author = {Christian, Ulrich}, title = {\"Uber die Scatteringmatrix elliptischer Modulgruppen}, journal = {Duke Math. J.}, volume = {64}, number = {1}, year = {1991}, pages = { 479-509}, language = {de}, url = {http://dml.mathdoc.fr/item/1077296368} }
Christian, Ulrich. Über die Scatteringmatrix elliptischer Modulgruppen. Duke Math. J., Tome 64 (1991) no. 1, pp. 479-509. http://gdmltest.u-ga.fr/item/1077296368/