@article{1077491418, author = {Whyburn, G. T.}, title = {The existence of certain transformations}, journal = {Duke Math. J.}, volume = {5}, number = {1}, year = {1939}, pages = { 647-655}, language = {en}, url = {http://dml.mathdoc.fr/item/1077491418} }
Whyburn, G. T. The existence of certain transformations. Duke Math. J., Tome 5 (1939) no. 1, pp. 647-655. http://gdmltest.u-ga.fr/item/1077491418/