Abdelsamie, P., A. E. Elarab, R. Ibrahim, and A. Rahman. “Facial Gingival Level Evaluation With and Without Connective Tissue Graft Using Tunnel Technique on Single Immediate Implants in the Esthetic Zone: A Randomized Controlled Clinical Trial”. Journal of Osseointegration, vol. 14, no. 2, Dec. 2021, pp. 69-80, doi:10.23805/JO.2022.14.11.