@article{MAN_1950__122_160203,
     author = {Ernst Lammel},
     title = {Die {Funktionentheorie} einer {Differentialgleichung} n-ten {Grades.} {I.}},
     journal = {Mathematische Annalen},
     pages = {109--126},
     publisher = {mathdoc},
     volume = {122},
     year = {1950},
     zbl = {0037.33401},
     url = {http://geodesic.mathdoc.fr/item/MAN_1950__122_160203/}
}