characterization and biological activity of some new tetra - azo compounds . University of Thi-Qar Journal of Science, [S. l.], v. 1, n. 2, p. 35–44, 2008. Disponível em: https://jsci.utq.edu.iq/index.php/main/article/view/269.. Acesso em: 7 may. 2024.