@article{1195581848,
author = {Kawaguchi, Akitsugu},
title = {Fundamental forms in the projective differential geometry of $m$-parametric families of hypersurfaces of the second order in the $n$-dimensional space},
journal = {Proc. Imp. Acad.},
volume = {3},
number = {8},
year = {1927},
pages = { 310-314},
language = {en},
url = {http://dml.mathdoc.fr/item/1195581848}
}
Kawaguchi, Akitsugu. Fundamental forms in the projective differential geometry of $m$-parametric families of hypersurfaces of the second order in the $n$-dimensional space. Proc. Imp. Acad., Tome 3 (1927) no. 8, pp. 310-314. http://gdmltest.u-ga.fr/item/1195581848/