Vovk, Myroslava I., Petro Ya. Pukach, Volodymyr M. Dilnyi, and Anatolij K. Prykarpatski. “Hilbert Space Decomposition Properties of Complex Functions and Their Applications”. Contemporary Mathematics 4, no. 4 (October 19, 2023): 702–709. Accessed July 3, 2024. https://ojs.wiserpub.com/index.php/CM/article/view/2386.