IlienkoM., and PolishchukA. “Convergence of Baum–Katz Series for Sums Whose Terms Are Elements of Linear $m$ Th Order Autoregressive Sequence”. Ukrains’kyi Matematychnyi Zhurnal, Vol. 75, no. 9, Sept. 2023, pp. 1237 -47, doi:10.3842/umzh.v75i9.7340.