Agil, Hasan, and Nurcan Akduran. “Structural, Electrical and Magnetic Properties of FeO Added GdBaCuO Superconductors”. Advanced Journal of Science and Engineering 1, no. 4 (October 25, 2020): 122-127. Accessed January 18, 2021. http://ajscieng.com/index.php/ajse/article/view/ajse2014122.