Olaechea, A., G. Mendoza-Azpur, E. Valdivia, and G. Rasperini. “Biodegradation of Three Different Collagen Membranes: A Histological Study”. Journal of Osseointegration, vol. 8, no. 2, Nov. 2016, pp. 15-19, doi:10.23805/jo.2016.08.02.01.