@article{MZ_1930__32_168241,
     author = {L., Heffter},
     title = {\"Uber den {Cauchyschen} {Integralsatz}},
     journal = {Mathematische Zeitschrift},
     pages = {476--480},
     publisher = {mathdoc},
     volume = {32},
     year = {1930},
     zbl = {56.0958.01},
     url = {http://geodesic.mathdoc.fr/item/MZ_1930__32_168241/}
}