Amirzargar, R., G. Shirani, H. Mahmoudhashemi, A. Khoshzaban, and M. Hasheminejad. “A Comparative Study of Ridge Preservation Using Calcium Sulfate and Collagen Membrane With and Without Freeze-Dried Bone Allograft Following Tooth Extraction”. Journal of Osseointegration, Vol. 10, no. 1, Mar. 2018, pp. 11-16, doi:10.23805/jo.2018.10.01.02.