Ali, Mohsen, and Saad Younis. “The Level of Photometry Is the Basic Level of the Hungarian Galaxy”. Journal of Education and Science (JES) 19, no. 2 (March 1, 2007): 111–121. Accessed August 6, 2025. https://ojs.uomosul.edu.iq/index.php/edusj/article/view/24100.