Leakey, Meave G., Fred Spoor, Frank H. Brown, et al. "New hominin genus from eastern Africa shows diverse middle Pliocene lineages." Nature 410 (March 2001): 433-440.

Leakey, Meave G., Fred Spoor, Frank H. Brown, et al. "New hominin genus from eastern Africa shows diverse middle Pliocene lineages." Nature 410 (March 2001): 433-440.