https://uomosul.edu.iq/science/%d8%ad%d8%b6%d9%88%d8%b1-%d9%85%d9%85%d9%8a%d8%b2-%d9%84%d9%83%d9%84%d9%8a%d8%a9-%d8%a7%d9%84%d8%b9%d9%84%d9%88%d9%85-%d9%81%d9%8a-%d9%85%d8%a4%d8%aa%d9%85%d8%b1-%d8%b9%d9%84%d9%85%d9%8a-%d8%af%d9%88/