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@article{PORMA_1979__38_1-2_115370, author = {Deleon, M.J.}, title = {A generalization of {Euler's} theorem}, journal = {Portugaliae mathematica}, pages = {103--105}, publisher = {mathdoc}, volume = {38}, number = {1-2}, year = {1979}, mrnumber = {0682357}, zbl = {0475.10002}, language = {en}, url = {http://geodesic.mathdoc.fr/item/PORMA_1979__38_1-2_115370/} }
Deleon, M.J. A generalization of Euler's theorem. Portugaliae mathematica, Tome 38 (1979) no. 1-2, pp. 103-105. http://geodesic.mathdoc.fr/item/PORMA_1979__38_1-2_115370/