@article{MZ_1922__14_183578,
     author = {E. Salkowski},
     title = {\"Uber den gemischten {Fl\"acheninhalt} zweier ebenen {Figuren}},
     journal = {Mathematische Zeitschrift},
     pages = {230--235},
     publisher = {mathdoc},
     volume = {14},
     year = {1922},
     zbl = {48.0833.07},
     url = {http://geodesic.mathdoc.fr/item/MZ_1922__14_183578/}
}