Viscous attenuation of gravitational waves propagating through an inhomogeneous background Shashank Shekhar Pandey, Arnab Sarkar, Amna Ali and Archan S. Majumdar Eur. Phys. J. C, 83 5 (2023) 435 Published online: 24 May 2023 DOI: 10.1140/epjc/s10052-023-11605-9