@article{00759555,
title = {Invariants and canonical equations of hypersurfaces of second order in },
journal = {Publications de l'Institut Math\'ematique. Nouvelle S\'erie},
volume = {55(69)},
year = {1994},
pages = {75-88},
zbl = {0823.53017},
language = {en},
url = {http://dml.mathdoc.fr/item/00759555}
}
Pevzner, S.L. Invariants and canonical equations of hypersurfaces of second order in . Publications de l'Institut Mathématique. Nouvelle Série, Tome 55(69) (1994) pp. 75-88. http://gdmltest.u-ga.fr/item/00759555/