Seiffert, E. R., Simons E. L., Ryan T. M., Bown T. M., Attia, Y. (2007) - NEW REMAINS OF EOCENE AND OLIGOCENE AFROSORICIDA (AFROTHERIA) FROM EGYPT, WITH IMPLICATIONS FOR THE ORIGIN(S) OF AFROSORICID ZALAMBDODONTY. Journal of Vertebrate Paleontology 27 (4): 963–972.