Martín-Vaquero, J., Hernández Encinas, A., Queiruga-Dios, A., Martínez, V., & del Rey, Ángel M. M. (2018). Numerical schemes for general Klein–Gordon equations with Dirichlet and nonlocal boundary conditions. Nonlinear Analysis: Modelling and Control, 23(1), 50-62. https://doi.org/10.15388/NA.2018.1.5