[1]N. T. H. Trang, D. T. T. Trung, N. T. T. Thi, P. T. L. Hang, P. T. V. Hoa, and P. B. Yen, “Antibacterial activity of <i> Piper betle </i> extracts on <i> Helicobacter pylori </i> and identification of potential compounds”, <i>AJB</i>, vol. 41, no. 4, Dec. 2019.