“The e.ffect of Simultaneous Doping . Of Pll in TJ. Q,6 Htyer of ’T’lJ-XPb. Ba2Ca2Co_309- O S Perconductors”. Ibn AL-Haitham Journal For Pure and Applied Sciences 21, no. 3 (September 23, 2017): 27–38. Accessed July 16, 2024. https://jih.uobaghdad.edu.iq/index.php/j/article/view/1402.