Stability of Cauchy horizon in a charged de-Sitter spacetime with dark matter Xue-Ying Nan, Jia Tan and Jie Jiang Eur. Phys. J. C, 83 5 (2023) 424 Published online: 22 May 2023 DOI: 10.1140/epjc/s10052-023-11627-3