Sreedhar, A., P. John, J. Pai, R. Baramappa, and S. Sikkander. “Efficacy of Propolis As an Adjunct to Scaling and Root Planing in Patients With Chronic Periodontitis - Placebo Controlled Study: Efficacy of Propolis As an Adjunct to Scaling and Root Planing in Patients With Chronic Periodontitis”. National Journal of Integrated Research in Medicine, vol. 8, no. 4, Feb. 2018, pp. 17-22, http://nicpd.ac.in/ojs-/index.php/njirm/article/view/1272.