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@article{10_4064_cm_15_1_1_9, author = {K. Urbanik}, title = {Remarks on symmetrical operations}, journal = {Colloquium Mathematicum}, pages = {1--9}, publisher = {mathdoc}, volume = {15}, number = {1}, year = {1966}, doi = {10.4064/cm-15-1-1-9}, language = {en}, url = {http://geodesic.mathdoc.fr/articles/10.4064/cm-15-1-1-9/} }
K. Urbanik. Remarks on symmetrical operations. Colloquium Mathematicum, Tome 15 (1966) no. 1, pp. 1-9. doi : 10.4064/cm-15-1-1-9. http://geodesic.mathdoc.fr/articles/10.4064/cm-15-1-1-9/
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