Gorbachuk, V. M., & Gorbachuk, M. L. (2006). On the correct solvability of the Dirichlet problem for operator differential equations in a Banach space. Ukrains’kyi Matematychnyi Zhurnal, 58(11), 1462–1476. Retrieved from https://umj.imath.kiev.ua/index.php/umj/article/view/3547