Olaechea, A., G. Mendoza-Azpur, E. Valdivia, and G. Rasperini. 2016. “Biodegradation of Three Different Collagen Membranes: A Histological Study”. Journal of Osseointegration 8 (2), 15-19. https://doi.org/10.23805/jo.2016.08.02.01.