Liu, Cuncai, and Fengjuan Meng. 2017. “Global Well-Posedness and Attractor for Damped Wave Equation With Sup-Cubic Nonlinearity and Lower Regular Forcing on $\mathbb{R}^3$”. Topological Methods in Nonlinear Analysis 49 (2):551-63. https://apcz.umk.pl/TMNA/article/view/TMNA.2016.088.