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@article{PORMA_1967__26_2_115020, author = {Norman, Lester J.}, title = {A sufficient condition for quasi-metrizability of a topological space}, journal = {Portugaliae mathematica}, pages = {207--211}, publisher = {mathdoc}, volume = {26}, number = {2}, year = {1967}, mrnumber = {0248740}, zbl = {0184.47903}, language = {en}, url = {http://geodesic.mathdoc.fr/item/PORMA_1967__26_2_115020/} }
Norman, Lester J. A sufficient condition for quasi-metrizability of a topological space. Portugaliae mathematica, Tome 26 (1967) no. 2, pp. 207-211. http://geodesic.mathdoc.fr/item/PORMA_1967__26_2_115020/