For citations:

Dautov R.Z., Salimzyanova G.R. A conservative fully discrete finite element scheme for the nonlinear Klein–Gordon equation. Uchenye Zapiski Kazanskogo Universiteta. Seriya Fiziko-Matematicheskie Nauki. 2023;165(3):190-207. (In Russ.) https://doi.org/10.26907/2541-7746.2023.3.190-207