@article{PORMA_1977__36_2_115311,
     author = {Morgado, Jos\'e},
     title = {Some remarks on two generalizations of {Euler's} theorem},
     journal = {Portugaliae mathematica},
     pages = {153--158},
     publisher = {mathdoc},
     volume = {36},
     number = {2},
     year = {1977},
     mrnumber = {0577419},
     zbl = {0434.10004},
     language = {en},
     url = {http://geodesic.mathdoc.fr/item/PORMA_1977__36_2_115311/}
}