@article{BAG_1986__21_138328,
     author = {U. STERZ},
     title = {Ber\"uhrungsvervollst\"andigung f\"ur ebene {Kurven} dritter {Ordnung.} {IV.} {Ber\"uhrungsbedingungen}},
     journal = {Beitr\"age zur Algebra und Geometrie},
     pages = {91--108},
     publisher = {mathdoc},
     volume = {21},
     year = {1986},
     url = {http://geodesic.mathdoc.fr/item/BAG_1986__21_138328/}
}