@article{ELMA_1979__34_141225,
     author = {H. Hotje},
     title = {Zur {Definition} des {Fl\"acheninhalts} in affinen {Ebenen.}},
     journal = {Elemente der Mathematik},
     pages = {25--31},
     publisher = {mathdoc},
     volume = {34},
     year = {1979},
     zbl = {0403.51003},
     url = {http://geodesic.mathdoc.fr/item/ELMA_1979__34_141225/}
}