TARASENKO, A. A.; URUM, G. D. On a class of generators of one-parameter $C_{0}$-semigroup of operators. Methods of Functional Analysis and Topology, [S. l.], v. 9, n. 2, p. 179–184, 2003. Disponível em: https://zen.imath.kiev.ua/index.php/mfat/article/view/213. Acesso em: 17 dec. 2025.