@article{GDZPPN002217473, title = {Einige Eigenschaften der Poincar\'eschen Reihen der Dimension -2.}, journal = {Manuscripta mathematica}, volume = {11}, year = {1973}, pages = {197-202}, zbl = {0264.30024}, url = {http://dml.mathdoc.fr/item/GDZPPN002217473} }
Elstrodt, Jürgen. Einige Eigenschaften der Poincaréschen Reihen der Dimension -2.. Manuscripta mathematica, Tome 11 (1973) pp. 197-202. http://gdmltest.u-ga.fr/item/GDZPPN002217473/