V. V. Mkhitaryan and M. E. Raikh, Slow oscillating dynamics of a two-level system subject to a fast telegraph noise: beyond the NIBA approximation, Low Temp. Phys. 48, 363–370, (2022) [Fiz. Nyzk. Temp. 48, 411-418, (2022)] DOI: https://doi.org/10.1063/10.0010199.