Voir la notice de l'article provenant de la source European Digital Mathematics Library
@article{BAG_1992__33_138503, author = {U. STERZ and K. DRECHSLER}, title = {Contact {Conditions} on {Conic} {Varieties} and {Halphen's} 2nd {Formula}}, journal = {Beitr\"age zur Algebra und Geometrie}, pages = {55--70}, publisher = {mathdoc}, volume = {33}, year = {1992}, zbl = {0769.14020}, url = {http://geodesic.mathdoc.fr/item/BAG_1992__33_138503/} }
U. STERZ; K. DRECHSLER. Contact Conditions on Conic Varieties and Halphen's 2nd Formula. Beiträge zur Algebra und Geometrie, Tome 33 (1992), pp. 55-70. http://geodesic.mathdoc.fr/item/BAG_1992__33_138503/