@article{2530,
author = {Norman, Lester J.},
title = {A sufficient condition for quasi-metrizability of a topological space},
journal = {Portugaliae mathematica},
volume = {26},
year = {1967},
pages = {207-211},
zbl = {0184.47903},
mrnumber = {0248740},
language = {en},
url = {http://dml.mathdoc.fr/item/2530}
}
Norman, Lester J. A sufficient condition for quasi-metrizability of a topological space. Portugaliae mathematica, Tome 26 (1967) pp. 207-211. http://gdmltest.u-ga.fr/item/2530/