Relativistic BGK hydrodynamics Pracheta Singha, Samapan Bhadury, Arghya Mukherjee and Amaresh Jaiswal Eur. Phys. J. C, 84 4 (2024) 417 Published online: 22 April 2024 DOI: 10.1140/epjc/s10052-024-12784-9