X-ray reflection spectroscopy with Kaluza–Klein black holes Jiachen Zhu, Askar B. Abdikamalov, Dimitry Ayzenberg, Mustapha Azreg-Aïnou, Cosimo Bambi, Mubasher Jamil, Sourabh Nampalliwar, Ashutosh Tripathi and Menglei Zhou Eur. Phys. J. C, 80 7 (2020) 622 Published online: 14 July 2020 DOI: 10.1140/epjc/s10052-020-8198-x