YAZID, F., OUCHENANE, D., & ZENNIR, K. (2022). Global nonexistence of solutions to system of Klein-Gordon equations with degenerate damping and strong source terms in viscoelasticity. Studia Universitatis Babeș-Bolyai Mathematica, 67(3), 563–578. https://doi.org/10.24193/subbmath.2022.3.08