Similarity Search by Generating Pivots Based on Manhattan Distance. - Eri Kobayashi; Takayasu Fushimi; Kazumi Saito; Tetsuo Ikeda (PRICAI, 2014)

Pivot-based k-means Algorithm for Numerous-class Data Sets. - Takashi Hattori; Kazuo Aoyama; Kazumi Saito; Tetsuo Ikeda; Eri Kobayashi (SDM, 2016)