Gudaryan, A. A., N. G. Idashkina, and S. V. Shirinkin. 2014. “Comparative Effectiveness of Using Resorbable Membranes of Polylactic Acid and Collagen in Regeneration of Bone Defects in Patients With Periimplantitis”. Medicni Perspektivi 19 (1):91-96. https://doi.org/10.26641/2307-0404.2014.1.24701.