@article{1077471932, author = {Shih, Hsiang-Lin}, title = {Mappings of $2$ -manifolds into a space}, journal = {Duke Math. J.}, volume = {10}, number = {1}, year = {1943}, pages = { 179-207}, language = {en}, url = {http://dml.mathdoc.fr/item/1077471932} }
Shih, Hsiang-Lin. Mappings of $2$ -manifolds into a space. Duke Math. J., Tome 10 (1943) no. 1, pp. 179-207. http://gdmltest.u-ga.fr/item/1077471932/