@article{1077488858, author = {Whyburn, G. T.}, title = {Generalized perfect sets}, journal = {Duke Math. J.}, volume = {1}, number = {1}, year = {1935}, pages = { 35-38}, language = {en}, url = {http://dml.mathdoc.fr/item/1077488858} }
Whyburn, G. T. Generalized perfect sets. Duke Math. J., Tome 1 (1935) no. 1, pp. 35-38. http://gdmltest.u-ga.fr/item/1077488858/