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@article{10_4064_cm_25_1_11_14, author = {J. P{\l}onka}, title = {On the number of polynomials of a universal algebra, {IV}}, journal = {Colloquium Mathematicum}, pages = {11--14}, publisher = {mathdoc}, volume = {25}, number = {1}, year = {1972}, doi = {10.4064/cm-25-1-11-14}, language = {en}, url = {http://geodesic.mathdoc.fr/articles/10.4064/cm-25-1-11-14/} }
J. Płonka. On the number of polynomials of a universal algebra, IV. Colloquium Mathematicum, Tome 25 (1972) no. 1, pp. 11-14. doi : 10.4064/cm-25-1-11-14. http://geodesic.mathdoc.fr/articles/10.4064/cm-25-1-11-14/
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