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@article{MAN_1974__207_162539, author = {J. Loustaunau}, title = {A {Characterization} of {Pt\`ak} {Spaces.}}, journal = {Mathematische Annalen}, pages = {177--180}, publisher = {mathdoc}, volume = {207}, year = {1974}, zbl = {0253.46003}, url = {http://geodesic.mathdoc.fr/item/MAN_1974__207_162539/} }
J. Loustaunau. A Characterization of Ptàk Spaces.. Mathematische Annalen, Tome 207 (1974), pp. 177-180. http://geodesic.mathdoc.fr/item/MAN_1974__207_162539/