Ceruso , F., P. Barnaba, S. Mazzoleni, L. Ottria, M. Gargari, A. Zucon, G. Bruno, and A. Di Fiore. “IMPLANT-ABUTMENT CONNECTIONS ON SINGLE CROWNS: A SYSTEMATIC REVIEW”. Oral & Implantology, vol. 10, no. 4, Dec. 2017, pp. 349-53, https://www.oimplantology.org/oimp/article/view/223.