@article{1077490795, author = {Bell, P. O.}, title = {Covariant configurations related to analytic curved surfaces}, journal = {Duke Math. J.}, volume = {4}, number = {1}, year = {1938}, pages = { 590-599}, language = {en}, url = {http://dml.mathdoc.fr/item/1077490795} }
Bell, P. O. Covariant configurations related to analytic curved surfaces. Duke Math. J., Tome 4 (1938) no. 1, pp. 590-599. http://gdmltest.u-ga.fr/item/1077490795/