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@article{10_4064_cm_29_1_83_85, author = {Ernest P{\l}onka}, title = {Idempotent words in nilpotent groups}, journal = {Colloquium Mathematicum}, pages = {83--85}, publisher = {mathdoc}, volume = {29}, number = {1}, year = {1974}, doi = {10.4064/cm-29-1-83-85}, language = {en}, url = {http://geodesic.mathdoc.fr/articles/10.4064/cm-29-1-83-85/} }
Ernest Płonka. Idempotent words in nilpotent groups. Colloquium Mathematicum, Tome 29 (1974) no. 1, pp. 83-85. doi : 10.4064/cm-29-1-83-85. http://geodesic.mathdoc.fr/articles/10.4064/cm-29-1-83-85/
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