Trinh, Duong, Phuong Tran, Hoa Nguyen, and Ly Ha. 2018. “Chromenes and Coumarins from the Roots of Paramignya Trimera”. Science & Technology Development Journal: Natural Sciences 1 (T5), 131-36. https://doi.org/https://doi.org/10.32508/stdjns.v1iT5.545.