Nguyen, Thanh Ngoc, and Vu Minh Tan. “Synthesis of Some bis(styryl) Containing Coumarin Ring from Substituted 3-Acetyl-4-Methylcoumarin ”. <i>Vietnam Journal of Science and Technology</i>, vol. 63, no. 5, Oct. 2025, pp. 864-7, doi:10.15625/2525-2518/18669.