Tri, N. and Nguyen, D. 2022. Chemical constituents of the lichen Usnea lapponica Vain., Parmeliaceae. VNUHCM Journal of Science and Technology Development. 25, 2 (May 2022), 2373-2380. DOI:https://doi.org/https://doi.org/10.32508/stdj.v25i2.3896.