Asmael, Huda, Ali Raouf, and Ali Saaed. “Development of Sinusitis After Sinus Floor Elevation Surgery: A Systematic Review”. Journal of Baghdad College of Dentistry 30, no. 4 (December 15, 2018): 20-23. Accessed November 19, 2019. http://jbcd.uobaghdad.edu.iq/index.php/jbcd/article/view/2550.