The Relationships between Supermassive Black Holes and Star Formation Rate in Active Galaxies using Optical Spectra Variability. Iraqi Journal of Science, [S. l.], v. 66, n. 4, p. 1692–1708, 2025. DOI: 10.24996/ijs.2025.66.4.26. Disponível em: https://ijs.uobaghdad.edu.iq/index.php/eijs/article/view/12250.. Acesso em: 15 may. 2025.