Carvalho, Alexandre Nolasco, and Matheus C. Bortolan. “Strongly Damped Wave Equation and Its Yosida Approximations”. Topological Methods in Nonlinear Analysis 46, no. 2 (December 1, 2015): 563–602. Accessed April 23, 2024. https://apcz.umk.pl/TMNA/article/view/TMNA.2015.059.