Slyusarchuk, V. Y. (2020) “Equations in a Hilbert space whose solution sets are invariant with respect to a group isomorphic to a one-parameter group of unitary operators”, Ukrains’kyi Matematychnyi Zhurnal, 72(1), pp. 86-99. Available at: https://umj.imath.kiev.ua/index.php/umj/article/view/687 (Accessed: 3December2023).