Golichenko, I. I., et al. “Extrapolation Problem for Periodically Correlated Stochastic Sequences With Missing Observations: Extrapolation Problem for Periodically Correlated Stochastic Sequences”. Bulletin of Taras Shevchenko National University of Kyiv. Physics and Mathematics, no. 2, Nov. 2021, pp. 39-52, https://doi.org/10.17721/1812-5409.2021/2.6.