GomilkoA. M. “Cayley Transform of the Generator of a Uniformly Bounded $C_0$-Semigroup of Operators”. Ukrains’kyi Matematychnyi Zhurnal 56, no. 8 (August 25, 2004): 1018-1029. Accessed November 24, 2024. https://umj.imath.kiev.ua/index.php/umj/article/view/3819.