@article{1077473374, author = {Whyburn, G. T.}, title = {Boundary alternation of monotone mappings}, journal = {Duke Math. J.}, volume = {12}, number = {1}, year = {1945}, pages = { 663-667}, language = {en}, url = {http://dml.mathdoc.fr/item/1077473374} }
Whyburn, G. T. Boundary alternation of monotone mappings. Duke Math. J., Tome 12 (1945) no. 1, pp. 663-667. http://gdmltest.u-ga.fr/item/1077473374/