@article{MAN_1978__236_163174,
     author = {Horst Schirmeier and Ursula Schirmeier},
     title = {Einige {Bemerkungen} \"uber den {Satz} von {Keldych.}},
     journal = {Mathematische Annalen},
     pages = {245--254},
     year = {1978},
     volume = {236},
     zbl = {0365.31002},
     url = {http://geodesic.mathdoc.fr/item/MAN_1978__236_163174/}
}