Liu, Haoxuan, and Haiming Zhang. 2020. “Structural, Electronic and Optical Properties of CsMI3(M=Ge,Sn,Pb) Perovskite from First Principles”. American Scientific Research Journal for Engineering, Technology, and Sciences 71 (1):87-98. https://asrjetsjournal.org/index.php/American_Scientific_Journal/article/view/6057.