Perturbations of massless external fields in a special Horndeski hairy black hole Zhen-Hao Yang, Yun-He Lei, Xiao-Mei Kuang and Jian-Pin Wu Eur. Phys. J. C, 84 2 (2024) 153 Published online: 14 February 2024 DOI: 10.1140/epjc/s10052-024-12511-4