S. I. Bondarenko, V. P. Timofeev, V. P. Koverya, and A. V. Krevsun, Hydrogen in superconductors , Low Temp. Phys. 50, (2024) [Fiz. Nyzk. Temp. 50, 667–723, (2024)] DOI: https://doi.org/10.1063/10.0027919.