@article{1077477211, author = {Tong, Hing}, title = {Some characterizations of normal and perfectly normal spaces}, journal = {Duke Math. J.}, volume = {19}, number = {1}, year = {1952}, pages = { 289-292}, language = {en}, url = {http://dml.mathdoc.fr/item/1077477211} }
Tong, Hing. Some characterizations of normal and perfectly normal spaces. Duke Math. J., Tome 19 (1952) no. 1, pp. 289-292. http://gdmltest.u-ga.fr/item/1077477211/