O. Kullmer, O. Sandrock, R. Abel, F. Schrenk, T. G. Bromage, and Y. M. Juwayeyi. The first Paranthropus from the Malawi Rift. J. Hum. Evol., volume 37, issue 1, pages 121-127, 1999. F. Schrenk, T. G. Bromage, C. G. Betzler, U. Ring, and Y. M. Juwayeyi. Oldest Homo and Pliocene Biogeography of the Malawi Rift. Nature, volume 365, issue 6449, pages 833-836, 1993.