Remarks on the light ring images and the optical appearance of hairy black holes in Einstein–Maxwell-dilaton gravityChatchai Promsiri, Weerawit Horinouchi and Ekapong HirunsirisawatEur. Phys. J. C, 84 9 (2024) 910DOI: https://doi.org/10.1140/epjc/s10052-024-13258-8