Gorbachuk, V. M., and M. L. Gorbachuk. “On the Correct Solvability of the Dirichlet Problem for Operator Differential Equations in a Banach Space”. Ukrains’kyi Matematychnyi Zhurnal 58, no. 11 (November 25, 2006): 1462–1476. Accessed March 28, 2024. https://umj.imath.kiev.ua/index.php/umj/article/view/3547.