Ismaeel, Shaima. “Synthesis of 3-Phenyl-4-Styryl and 3-Phenyl-4-Hydroxy Coumarins”. Journal of Education and Science (JES) 21, no. 2 (June 1, 2008): 12–18. Accessed August 7, 2025. https://ojs.uomosul.edu.iq/index.php/edusj/article/view/24418.