Le, Nguyen Thanh, et al. “Anthraquinone and Xanthone Derivatives from Propolis of Tetragonula Laeviceps Stingless Bee: Anthraquinones and Xanthones from Tetragonula Laeviceps Propolis”. <i>Vietnam Journal of Science and Technology</i>, vol. 63, no. 2, Apr. 2025, pp. 262-7, doi:10.15625/2525-2518/18478.