Macías-Díaz, J. “Computer Simulation of the Energy Dynamics of a Sinusoidally Perturbed Double Sine-Gordon Equation: An Application to the Transmission of Wave Signals”. Revista Mexicana De Física, vol. 58, no. 1, Jan. 2012, pp. 29-40, https://rmf.smf.mx/ojs/index.php/rmf/article/view/3881.