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@article{PORMA_1967__26_2_115010, author = {Yaqub, Adil}, title = {On the equational interdefinability of certain operations}, journal = {Portugaliae mathematica}, pages = {125--131}, publisher = {mathdoc}, volume = {26}, number = {2}, year = {1967}, mrnumber = {0248070}, zbl = {0183.00901}, language = {en}, url = {http://geodesic.mathdoc.fr/item/PORMA_1967__26_2_115010/} }
Yaqub, Adil. On the equational interdefinability of certain operations. Portugaliae mathematica, Tome 26 (1967) no. 2, pp. 125-131. http://geodesic.mathdoc.fr/item/PORMA_1967__26_2_115010/