Isac, Jayakumari. “OPTICAL BAND GAP ANALYSIS OF NANO-CRYSTALLINE CERAMIC PbSrCaCuO”. JOURNAL OF ADVANCES IN PHYSICS 5, no. 3 (September 11, 2014): 816–822. Accessed January 4, 2025. https://rajpub.com/index.php/jap/article/view/1637.