@article{1077472094, author = {Wu, George}, title = {Systems of quadrics associated with a point of a surface, I}, journal = {Duke Math. J.}, volume = {10}, number = {1}, year = {1943}, pages = { 499-513}, language = {en}, url = {http://dml.mathdoc.fr/item/1077472094} }
Wu, George. Systems of quadrics associated with a point of a surface, I. Duke Math. J., Tome 10 (1943) no. 1, pp. 499-513. http://gdmltest.u-ga.fr/item/1077472094/