@article{JRAM_1974__0268_0269_151449,
     author = {P. Ribenboim},
     title = {Polynomials whose values are powers.},
     journal = {Journal f\"ur die reine und angewandte Mathematik},
     pages = {34--40},
     publisher = {mathdoc},
     volume = {0268_0269},
     year = {1974},
     zbl = {0299.12103},
     url = {http://geodesic.mathdoc.fr/item/JRAM_1974__0268_0269_151449/}
}