MinhN. T. H., HạnhN. T., and HảiL. T. T. “Evaluation of Metronidazole Gel As an Adjunct to Conventional Nonsurgical Therapy in Periodontitis Patients”. Tạp Chí Y Dược lâm sàng 108, Vol. 17, no. 1, Jan. 2022, doi:10.52389/ydls.v17i1.1068.