Salih, Khalid Jamal, and Sabah Jalal Fathi. “Effect of Aluminum Oxide (Al₂O₃) Addition on the Structural and Electrical Properties of Bi-2223 High-Temperature Superconductors (Bi₂Ca₂Ba₂) ₁₋ₓAl₂O₃Cu₃O₁₀₊δ”. Central Asian Journal of Medical and Natural Science 6, no. 4 (July 26, 2025): 1590-1597. Accessed August 30, 2025. https://cajmns.casjournal.org/index.php/CAJMNS/article/view/2873.