Fluctuations of non-ergodic stochastic processesG. George, L. Klochko, A. N. Semenov, J. Baschnagel and J. P. WittmerEur. Phys. J. E, 44 4 (2021) 54DOI: https://doi.org/10.1140/epje/s10189-021-00070-5