OUCHENANE, Djamel, Zineb KHALILI, and Fares YAZID. “Global Nonexistence of Solution for Coupled Nonlinear Klein-Gordon With Degenerate Damping and Source Terms”. Studia Universitatis Babeș-Bolyai Mathematica 67, no. 4 (December 2, 2022): 801–815. Accessed February 5, 2025. https://studia.reviste.ubbcluj.ro/index.php/subbmathematica/article/view/2635.