@article{BAG_1981__11_138197,
     author = {U. STERZ and K. DRECHSLER},
     title = {Ber\"uhrungsbedingungen f\"ur {p-l-s-Kegelschnitte}},
     journal = {Beitr\"age zur Algebra und Geometrie},
     pages = {109--118},
     publisher = {mathdoc},
     volume = {11},
     year = {1981},
     zbl = {0477.51017},
     url = {http://geodesic.mathdoc.fr/item/BAG_1981__11_138197/}
}