Unveiling the unconventional optical signatures of regular black holes within accretion diskSen Guo, Yu-Xiang Huang, Yu-Hao Cui, Yan Han, Qing-Quan Jiang, En-Wei Liang and Kai LinEur. Phys. J. C, 83 11 (2023) 1059DOI: https://doi.org/10.1140/epjc/s10052-023-12208-0