Nguyen, Manh Hung, and Thi Loan Tran. 2002. “On the Stability of Semilinear Nonautonomous Evolution Equations in Banach Spaces and Its Application to Strongly Parabolic Equations”. Ukrains’kyi Matematychnyi Zhurnal 54 (12): 1714-19. https://umj.imath.kiev.ua/index.php/umj/article/view/4212.