1. Human skeletons of Techuacan;ANDERsoN, J.E.;Science,1965
2. See p497: four early skeletons of El Riego phase (6800 to 5000 BC) with healed fractures. FERIZ H;War and surgery in ancient Peru. Abbotempo,1968
3. Neolithic trepanned skulls. Pateopathologie et pathologie comparative. Paris. Masson 1930; P 76. Neanderthal man (middle PalaeQlithic): healed fracture Qf left humerus;PALES, L.
4. Acad Med;NY,1976
5. The archaeological survey of Nubia (report for 1907 to 1980). Vol II. The human remains;E, G.; W, J.O.N.E.S.F.,1910