Goyal, D. R., D. K. M. Anand, and D. D. K. “Root Coverage With Free Rotated Papilla Autograft Using Envelop Technique: Gingival Recession”. National Journal of Integrated Research in Medicine, vol. 2, no. 4, Dec. 2011, pp. 117-20, http://nicpd.ac.in/ojs-/index.php/njirm/article/view/1954.