@article{1250129115, author = {Warren, Richard H.}, title = {Fuzzy topologies characterized by neighborhood systems}, journal = {Rocky Mountain J. Math.}, volume = {9}, number = {4}, year = {1979}, pages = { 761-764}, language = {en}, url = {http://dml.mathdoc.fr/item/1250129115} }
Warren, Richard H. Fuzzy topologies characterized by neighborhood systems. Rocky Mountain J. Math., Tome 9 (1979) no. 4, pp. 761-764. http://gdmltest.u-ga.fr/item/1250129115/