@article{MZ_1923__18_167755,
     author = {E. Fischer},
     title = {Modulysteme und {Differentialgleichungen}},
     journal = {Mathematische Zeitschrift},
     pages = {230--277},
     year = {1923},
     volume = {18},
     language = {de},
     url = {http://geodesic.mathdoc.fr/item/MZ_1923__18_167755/}
}