@article{MZ_1923__18_167758,
     author = {G. Kowalewski},
     title = {Integrationslose {Berechnung} invarianter {Bogen-} und {Fl\"achen-elemente} ebener {Transformationsgruppen}},
     journal = {Mathematische Zeitschrift},
     pages = {307--311},
     publisher = {mathdoc},
     volume = {18},
     year = {1923},
     zbl = {49.0299.07},
     url = {http://geodesic.mathdoc.fr/item/MZ_1923__18_167758/}
}