@article{ELMA_1960__15_140717,
     author = {A. Rotkiewicz},
     title = {Sur le probl\`eme de {Catalan.}},
     journal = {Elemente der Mathematik},
     pages = {121--124},
     publisher = {mathdoc},
     volume = {15},
     year = {1960},
     zbl = {0096.02804},
     url = {http://geodesic.mathdoc.fr/item/ELMA_1960__15_140717/}
}