@article{1183491959, author = {Hollcroft, T. R.}, title = {Singularities of the Hessian}, journal = {Bull. Amer. Math. Soc.}, volume = {33}, number = {6}, year = {1927}, pages = { 90-96}, language = {en}, url = {http://dml.mathdoc.fr/item/1183491959} }
Hollcroft, T. R. Singularities of the Hessian. Bull. Amer. Math. Soc., Tome 33 (1927) no. 6, pp. 90-96. http://gdmltest.u-ga.fr/item/1183491959/