@article{GDZPPN002081687,
title = {Note on the diophantine equation 1 + x + x2 + ... + xn = ym.},
journal = {Elemente der Mathematik},
volume = {42},
year = {1987},
pages = {76-76},
zbl = {0703.11016},
url = {http://dml.mathdoc.fr/item/GDZPPN002081687}
}
Rotkiewicz, A. Note on the diophantine equation 1 + x + x2 + ... + xn = ym.. Elemente der Mathematik, Tome 42 (1987) p. 76. http://gdmltest.u-ga.fr/item/GDZPPN002081687/