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@article{MAN_1959__137_160677, author = {H. MAASS}, title = {Zur {Theorie} der harmonischen {Formen.}}, journal = {Mathematische Annalen}, pages = {142--149}, publisher = {mathdoc}, volume = {137}, year = {1959}, zbl = {0083.06002}, url = {http://geodesic.mathdoc.fr/item/MAN_1959__137_160677/} }
H. MAASS. Zur Theorie der harmonischen Formen.. Mathematische Annalen, Tome 137 (1959), pp. 142-149. http://geodesic.mathdoc.fr/item/MAN_1959__137_160677/