@article{MAN_1957__133_160548,
     author = {W. Hahn},
     title = {\"Uber {Differential-Differenzengleichungen} mit anomalen {L\"osungen.}},
     journal = {Mathematische Annalen},
     pages = {251--255},
     year = {1957},
     volume = {133},
     zbl = {0082.08702},
     url = {http://geodesic.mathdoc.fr/item/MAN_1957__133_160548/}
}