RETRACTED: Influence of Molar Ratio and Lattice Strain on the Electronic Bandgap of Bismuth Chromium Oxide Nano particlesRoopa K. N, H.C. Manjunatha, Rajavaram Ramaraghavulu and R. MunirathnamEPJ Web Conf., 359 (2026) 01017DOI: https://doi.org/10.1051/epjconf/202635901017