@article{1102810903, author = {Quine, J. R.}, title = {Tangent winding numbers and branched mappings.}, journal = {Pacific J. Math.}, volume = {73}, number = {2}, year = {1977}, pages = { 161-167}, language = {en}, url = {http://dml.mathdoc.fr/item/1102810903} }
Quine, J. R. Tangent winding numbers and branched mappings.. Pacific J. Math., Tome 73 (1977) no. 2, pp. 161-167. http://gdmltest.u-ga.fr/item/1102810903/