Vovk, M.I., Pukach, P.Y. , Dilnyi, V.M. and Prykarpatski, A.K. 2023. Hilbert Space Decomposition Properties of Complex Functions and Their Applications. Contemporary Mathematics. 4, 4 (Oct. 2023), 702–709. DOI:https://doi.org/10.37256/cm.4420232386.