@article{MZ_1940__46_168896,
     author = {A., Herzig},
     title = {Die {Winkelderivierte} und das {Poisson-StieItjes-Integral}},
     journal = {Mathematische Zeitschrift},
     pages = {129--156},
     publisher = {mathdoc},
     volume = {46},
     year = {1940},
     zbl = {0022.23802},
     url = {http://geodesic.mathdoc.fr/item/MZ_1940__46_168896/}
}