1. M. Rock, Kunstliche ersatzteile fur sas innere and aussere des menschlichen und tierischen korpers (Artificial spare parts for the interior and exterior of the human and animal body), German Patent 583589, Filed 22 April 1932, 1933.
2. S. Sandhaus, Bone implants and drills and taps for bone surgery, British Patent 1,083,769, 1965.
3. Ceramic prostheses, a medical engineering team reports progress in impant research;Eyring;News Engl.,1969
4. L’Alumine et son utilisation en chirurgie de la hanche (Experimental study of alumina and its use in surgery of the hip);Boutin;Presse Med.,1971
5. Arhthroplastie totale de la hanche par prostheses en alumina fritte (Total arthroplasty of the hip by fritted alumina prosthesis);Boutin;Rev. Chir. Orthop.,1972