Guarín Grisales, Alvaro, and Gabriel Jaime Páramo B. “Study of State of the Art of Injection Molding in Colombia”. Revista Universidad EAFIT, vol. 38, no. 128, June 2012, pp. 53-65, https://publicaciones.eafit.edu.co/index.php/revista-universidad-eafit/article/view/847.