E.Ya. Rudavskii, O.I. Kirichek, and V.K. Chagovets, Sviatoslav Sergeevich Sokolov To the 70th birthday, Low Temp. Phys. 49, 893–894, (2023) [Fiz. Nyzk. Temp. 49, 983–984, (2023)] DOI: https://doi.org/10.1063/10.0020157.