@article{1077491075, author = {Coburn, Nathaniel}, title = {Surfaces in four-space of constant curvature}, journal = {Duke Math. J.}, volume = {5}, number = {1}, year = {1939}, pages = { 30-38}, language = {en}, url = {http://dml.mathdoc.fr/item/1077491075} }
Coburn, Nathaniel. Surfaces in four-space of constant curvature. Duke Math. J., Tome 5 (1939) no. 1, pp. 30-38. http://gdmltest.u-ga.fr/item/1077491075/