“Effect of Active Galactic Nuclei (AGN) on the Photometric and Morphologic Properties of NGC 4414 and NGC 4369 Spiral Galaxies”. Al-Nahrain Journal of Science 22, no. 1 (March 1, 2019): 62–73. Accessed May 5, 2024. https://anjs.edu.iq/index.php/anjs/article/view/2099.