A.L. Solovjov, L.V. Bludova, M.V. Shytov, S.N. Kamchatnaya, Z.F. Nazyrov, and R.V. Vovk, Evolution of the pseudogap and excess conductivity of YBa₂Cu₃O_7–δ single crystals in the course of long-term aging, Low Temp. Phys. 49, (2023) [Fiz. Nyzk. Temp. 49, 517–526, (2023)] DOI: https://doi.org/10.1063/10.0017593.