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@article{EXMA_1995__4_3_229882, author = {Jagy, William C. and Kaplansky, Irving}, title = {Sums of squares, cubes, and higher powers.}, journal = {Experimental mathematics}, pages = {169--173}, publisher = {mathdoc}, volume = {4}, number = {3}, year = {1995}, zbl = {0867.11066}, language = {en}, url = {http://geodesic.mathdoc.fr/item/EXMA_1995__4_3_229882/} }
Jagy, William C.; Kaplansky, Irving. Sums of squares, cubes, and higher powers.. Experimental mathematics, Tome 4 (1995) no. 3, pp. 169-173. http://geodesic.mathdoc.fr/item/EXMA_1995__4_3_229882/