Jasim, Kareem A., Mohammed A.N. Thejeel, & Raghad Subhi Al-Khafaji. " The Effect of Doping by Sr on the Structural, Mechanical and Electrical Characterization of La1Ba1-xSrx Ca2Cu4O8.5+δ." Ibn AL- Haitham Journal For Pure and Applied Science [Online], 27.1 (2014): 170-175. Web. 30 Nov. 2019