Kenji Koyama Yukio Tsuruoka Hiroshi Sekigawa On searching for solutions of the Diophantine equation x<sup>3</sup> + y<sup>3</sup> + z<sup>3</sup> = n. 841-851 1997 66 Math. Comput. 218 db/journals/moc/moc66.html#KoyamaTS97