@article{ELMA_1963__18_140770,
     author = {A. Rotkiewicz},
     title = {Remarque sur les nombres parfaits pairs de la forme an ... bn.},
     journal = {Elemente der Mathematik},
     pages = {76--78},
     publisher = {mathdoc},
     volume = {18},
     year = {1963},
     zbl = {0115.26304},
     url = {http://geodesic.mathdoc.fr/item/ELMA_1963__18_140770/}
}