@article{BAG_1983__14_138230,
     author = {GERHARD GEISE},
     title = {Eine die {Kegelschnitte} charakterisierende {Eigenschaft}},
     journal = {Beitr\"age zur Algebra und Geometrie},
     pages = {29--32},
     publisher = {mathdoc},
     volume = {14},
     year = {1983},
     zbl = {0512.53002},
     url = {http://geodesic.mathdoc.fr/item/BAG_1983__14_138230/}
}