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@article{10_4064_cm_8_1_23_26, author = {A. Lelek}, title = {Some remarks on symmetric relations}, journal = {Colloquium Mathematicum}, pages = {23--26}, publisher = {mathdoc}, volume = {8}, number = {1}, year = {1961}, doi = {10.4064/cm-8-1-23-26}, language = {en}, url = {http://geodesic.mathdoc.fr/articles/10.4064/cm-8-1-23-26/} }
A. Lelek. Some remarks on symmetric relations. Colloquium Mathematicum, Tome 8 (1961) no. 1, pp. 23-26. doi : 10.4064/cm-8-1-23-26. http://geodesic.mathdoc.fr/articles/10.4064/cm-8-1-23-26/
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