Gurin, A., V. Komlev, A. Fedotov, P. Kopnin, and L. Grigoryanz. “Sinus-Lift Augmentation With Original Tricalcium Phosphate Synthetic Biomaterials”. Clinical Dentistry (Russia), no. 1, Mar. 2015, p. 30—34, http://www.kstom.ru/ks/article/view/0073-07.