@article{GDZPPN00036374X,
title = {A Sylvester Theorem for Conic Sections.},
journal = {Discrete \& computational geometry},
volume = {3},
year = {1988},
pages = {295-306},
zbl = {0643.51009},
url = {http://dml.mathdoc.fr/item/GDZPPN00036374X}
}
Wiseman, J.A.; Wilson, Paul R. A Sylvester Theorem for Conic Sections.. Discrete & computational geometry, Tome 3 (1988) pp. 295-306. http://gdmltest.u-ga.fr/item/GDZPPN00036374X/