On generation of a stochastic GW background by the scattering on relic wormholes A. A. Kirillov, E. P. Savelova and O. M. Lecian Eur. Phys. J. C, 81 3 (2021) 263 Published online: 29 March 2021 DOI: 10.1140/epjc/s10052-021-09061-4