1. Mustafa K. Kamil1 and Kareem A. Jasim, “Investigation the Crystalline Size and Strain of Perovskite (YBa2Cu3O6+σ) by variant method, Test engineering & management”, Page No. 8719–8723,(2020).
2. Inoue, Naoki and Zou, Yanhui, “Physical properties of perovskite-type lithium ionic conductor. (2006),”
3. Eschrig, Helmut. “Theory of Superconductivity.” A Primer., Inst. for Solid State and Materials Research, Dresden Univ. of Tech., Germany (2001): 28.
4. Natural and engineered perovskites
5. Wenk, Hans-Rudolf, and Andrey Bulakh. Minerals: their constitution and origin. Cambridge University Press, 2016.