Cortés Ramos, L. V., K. J. Artunduaga, Y. A. Suarez, and J. A. Marín Peña. “Classroom Experience: Model of the Functioning of the Heart. Tool Learning Teaching of Electric Circuits”. Amazonia Investiga, vol. 5, no. 8, June 2016, pp. 41-50, https://amazoniainvestiga.info/index.php/amazonia/article/view/701.