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@article{ELMA_1987__42_4_141403, author = {A. Rotkiewicz}, title = {Note on the diophantine equation 1 + x + x2 + ... + xn = ym.}, journal = {Elemente der Mathematik}, pages = {76--76}, publisher = {mathdoc}, volume = {42}, number = {4}, year = {1987}, zbl = {0703.11016}, url = {http://geodesic.mathdoc.fr/item/ELMA_1987__42_4_141403/} }
A. Rotkiewicz. Note on the diophantine equation 1 + x + x2 + ... + xn = ym.. Elemente der Mathematik, Tome 42 (1987) no. 4, p. 76. http://geodesic.mathdoc.fr/item/ELMA_1987__42_4_141403/