Hamdi Razeg, Khalid, Kareem D. Alazawi, and Mahmood Ahmed Hmood. “Structural and Electrical Properties of the High Temperature Superconducting System Bi2Ba2Ca2Cu3O10+δ”. Journal of Education and Science (JES) 24, no. 4 (January 1, 1970): 114–122. Accessed August 6, 2025. https://ojs.uomosul.edu.iq/index.php/edusj/article/view/23540.