Liu, C., and F. Meng. “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, vol. 49, no. 2, Jan. 2017, pp. 551-63, https://apcz.umk.pl/TMNA/article/view/TMNA.2016.088.