Hamdi Razeg, K., خالد, K. D. Alazawi, کریم, M. Ahmed Hmood, and محمود. “Structural and Electrical Properties of the High Temperature Superconducting System Bi2Ba2Ca2Cu3O10+δ”. Journal of Education and Science (JES), vol. 24, no. 4, Jan. 1970, pp. 114-22, doi:10.33899/edusj.1970.58952.