To the theory of dynamical properties of non-dilute polydisperse ferrofluids A. Yu. Zubarev and L. Yu. Iskakova Eur. Phys. J. Spec. Top., 232 8 (2023) 1305-1313 Published online: 13 April 2023 DOI: 10.1140/epjs/s11734-023-00820-w