1. http://www.cdc.gov/nchs/fastats/insurg.htm, [last accessed 02.12.12].
2. http://emedicine.medscape.com/article/434875-overview, [last accessed 02.12.12].
3. A review of bone substitutes;Kao;Oral and Maxillofacial Surgery Clinics of North America,2007
4. Bone grafts in orthopedic surgery;Zarate-Kalfopulos;Cirugia y Cirujanos,2006
5. Osteogenic cells on bio-inspired materials for bone tissue engineering;Vagaska;Physiological Research,2010