Observational appearance of a freely-falling star in an asymmetric thin-shell wormhole Yiqian Chen, Peng Wang, Houwen Wu and Haitang Yang Eur. Phys. J. C, 83 5 (2023) 361 Published online: 04 May 2023 DOI: 10.1140/epjc/s10052-023-11486-y