@article{MAN_1973__203_162446,
     author = {Ingo Haeseler and Stephan Ruscheweyh},
     title = {Singul\"are {Eichlerintegrale} und verallgemeinerte {Eisensteinreihen.}},
     journal = {Mathematische Annalen},
     pages = {251--260},
     publisher = {mathdoc},
     volume = {203},
     year = {1973},
     zbl = {0244.30018},
     url = {http://geodesic.mathdoc.fr/item/MAN_1973__203_162446/}
}