Gawish, A. S., M. S. Attia, D. A. Osman, M. Bahrawy, and M. M. Tawfeq. “Evaluation of Propolis Gel in Two Different Polymeric Systems As an Adjunctive Aid to Non-Surgical Therapy in the Management of Stage III Grade B Periodontitis: A Randomized Clinical Trial”. Perio J, vol. 6, no. 1, Oct. 2022, pp. 36-45, doi:10.26810/perioj.2022.a4.