@article{MZ_1956__64_169575,
     author = {Karl-Bernhard Gundlach},
     title = {Poincar\'esche und {Eisensteinsche} {Reihen} zur {Hilbertschen} {Modulgruppe.}},
     journal = {Mathematische Zeitschrift},
     pages = {339--352},
     publisher = {mathdoc},
     volume = {64},
     year = {1956},
     zbl = {0071.07703},
     url = {http://geodesic.mathdoc.fr/item/MZ_1956__64_169575/}
}