@article{1200687719, author = {Nagumo, Mitio}, title = {A note on the theory of degree of mapping in Euclidean spaces}, journal = {Osaka Math. J.}, volume = {4}, number = {1}, year = {1952}, pages = { 1-9}, language = {en}, url = {http://dml.mathdoc.fr/item/1200687719} }
Nagumo, Mitio. A note on the theory of degree of mapping in Euclidean spaces. Osaka Math. J., Tome 4 (1952) no. 1, pp. 1-9. http://gdmltest.u-ga.fr/item/1200687719/