@article{BAG_1980__10_138175,
     author = {U. STERZ and K. DRECHSLER},
     title = {Vervollst\"andigung von {Kegelschnittmengen}},
     journal = {Beitr\"age zur Algebra und Geometrie},
     pages = {27--32},
     publisher = {mathdoc},
     volume = {10},
     year = {1980},
     url = {http://geodesic.mathdoc.fr/item/BAG_1980__10_138175/}
}