@article{MZ_1942__47_168962,
     author = {H., Willich},
     title = {Ganze {L\"osungen} der {Differentialgleichung} w},
     journal = {Mathematische Zeitschrift},
     pages = {422--426},
     year = {1942},
     volume = {47},
     url = {http://geodesic.mathdoc.fr/item/MZ_1942__47_168962/}
}