@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/