Synthesis and chractrisation of di azo dyes using 7-hydroxy-4-methyl coumarin as a coupling compound. Journal of Hama University , [S. l.], v. 6, n. 8, 2024. Disponível em: https://journal.hama-univ.edu.sy/huj/article/view/1416. Acesso em: 6 jun. 2026.