@article{2804, author = {Morgado, Jos\'e}, title = {Another generalization of Euler's theorem}, journal = {Portugaliae mathematica}, volume = {35}, year = {1976}, pages = {241-243}, zbl = {0368.10005}, mrnumber = {0469857}, language = {en}, url = {http://dml.mathdoc.fr/item/2804} }
Morgado, José. Another generalization of Euler's theorem. Portugaliae mathematica, Tome 35 (1976) pp. 241-243. http://gdmltest.u-ga.fr/item/2804/