1. I. Bialynicki-Birula and J. Mycielski, Bull. Acad. Polon. Sci. Ser. Sci. Math. Astron. Phys. 23, 4 (1975).
2. P. Gorka, Acta Phys. Polon. 40, 1 (2009).
3. G. Li, L. Hong and W. Liu, Appl. Anal. 92, 5 (2013).
4. Space-time decay estimates of solutions to liquid crystal system in \begin{document}$\mathbb{R}^3$\end{document}
5. Well-posedness results for a sixth-order logarithmic Boussinesq equation