GORODNII, M. F. On the invertibility of the operator d/dt + A in certain functional spaces. Ukrains’kyi Matematychnyi Zhurnal, [S. l.], v. 59, n. 8, p. 1020–1025, 2007. Disponível em: https://umj.imath.kiev.ua/index.php/umj/article/view/3365. Acesso em: 6 dec. 2025.