Voir la notice de l'article provenant de la source European Digital Mathematics Library
@article{PORMA_1957__16_1_114783, author = {McCarthy, Paul J.}, title = {Note on perfect and multiply perfect numbers}, journal = {Portugaliae mathematica}, pages = {19--21}, publisher = {mathdoc}, volume = {16}, number = {1}, year = {1957}, mrnumber = {0101209}, zbl = {0082.25606}, language = {en}, url = {http://geodesic.mathdoc.fr/item/PORMA_1957__16_1_114783/} }
McCarthy, Paul J. Note on perfect and multiply perfect numbers. Portugaliae mathematica, Tome 16 (1957) no. 1, pp. 19-21. http://geodesic.mathdoc.fr/item/PORMA_1957__16_1_114783/