Existence of gradient CKV and gradient conformally stationary LRS spacetimes Seoktae Koh, A. M. Sherif and G. Tumurtushaa Eur. Phys. J. C, 84 1 (2024) 69 Published online: 23 January 2024 DOI: 10.1140/epjc/s10052-024-12425-1