@article{1077476578, author = {Hsiung, Chuan-Chih}, title = {Conjugate nets in three- and four-dimensional spaces}, journal = {Duke Math. J.}, volume = {18}, number = {1}, year = {1951}, pages = { 487-499}, language = {en}, url = {http://dml.mathdoc.fr/item/1077476578} }
Hsiung, Chuan-Chih. Conjugate nets in three- and four-dimensional spaces. Duke Math. J., Tome 18 (1951) no. 1, pp. 487-499. http://gdmltest.u-ga.fr/item/1077476578/