Upper Bound of the Blowing-up Time of kth-order Solution for Nonlinear Wave Equation with Averaged Damping in Rn. Math. Struct. Comput. Model. [Internet]. 2025 Jul. 12 [cited 2026 Jan. 2];1:4-11. Available from: https://www.mscmjournal.com/index.php/mscm/article/view/4