TuanV. M., HoangN. D., TungD. S., DongT. T., ThanhL. H., PhuongN. M., GiangN. T., and DanV. M. “A Systematic Review on Effectiveness of Tongue Cleaning Methods in Tongue Coating Removal”. Tạp Chí Y Dược lâm sàng 108, Vol. 18, no. 7, Sept. 2023, doi:10.52389/ydls.v18i7.2053.