H. Hardan and A. K. Ahmed, “Effect of Active Galactic Nuclei (AGN) on the Photometric and Morphologic Properties of NGC 4414 and NGC 4369 Spiral Galaxies”, Al-Nahrain J. Sci., vol. 22, no. 1, pp. 62–73, Mar. 2019, Accessed: May 22, 2026. [Online]. Available: https://mail.anjs.edu.iq/index.php/anjs/article/view/2099