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@article{10_4064_cm_17_1_147_152, author = {J. {\L}ukaszewicz}, title = {Julian {Perkal}}, journal = {Colloquium Mathematicum}, pages = {147--152}, publisher = {mathdoc}, volume = {17}, number = {1}, year = {1967}, doi = {10.4064/cm-17-1-147-152}, language = {de}, url = {http://geodesic.mathdoc.fr/articles/10.4064/cm-17-1-147-152/} }
J. Łukaszewicz. Julian Perkal. Colloquium Mathematicum, Tome 17 (1967) no. 1, pp. 147-152. doi : 10.4064/cm-17-1-147-152. http://geodesic.mathdoc.fr/articles/10.4064/cm-17-1-147-152/
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