@article{ELMA_1990__45_6_141495,
     author = {R. St\"ark},
     title = {Ein {Satz} \"uber {Eckentfernungen} beim {Dreieck.}},
     journal = {Elemente der Mathematik},
     pages = {155--165},
     publisher = {mathdoc},
     volume = {45},
     number = {6},
     year = {1990},
     zbl = {0725.51010},
     url = {http://geodesic.mathdoc.fr/item/ELMA_1990__45_6_141495/}
}