Testing black holes in a perfect fluid dark matter environment using quasinormal modes Qun Tan, Dong Liu, Jie Liang and Zheng-Wen Long Eur. Phys. J. C, 85 6 (2025) 687 Published online: 23 June 2025 DOI: 10.1140/epjc/s10052-025-14407-3