ISMAEEL, S. Synthesis of 3-phenyl-4-styryl and 3-phenyl-4-hydroxy coumarins. Journal of Education and Science, [S. l.], v. 21, n. 2, p. 12–18, 2008. DOI: 10.33899/edusj.2008.51234. Disponível em: https://edusj.uomosul.edu.iq/index.php/edusj/article/view/42544. Acesso em: 10 sep. 2025.