Aguilar-Ibañez, C., O. Octavio Gutierrez F., and H. Sossa A. “Controlled Lagrangian Approach to the Stabilization of the Inverted Pendulum System”. Revista Mexicana De Física, vol. 54, no. 4, Jan. 2008, pp. 329-0, https://rmf.smf.mx/ojs/index.php/rmf/article/view/3628.