KapustyanO. V., and ShkundinD. V. “Global Attractor of One Nonlinear Parabolic Equation”. Ukrains’kyi Matematychnyi Zhurnal, Vol. 55, no. 4, Apr. 2003, pp. 446-55, https://umj.imath.kiev.ua/index.php/umj/article/view/3918.