Calle Sigüencia, J. I. ., S. V. . Astudillo León, H. P. . Morocho Campos, and Édgar O. . García Salinas. “Automated Machine Design to Shape Eyes and Ears of Automotive Crossbows”. I+ T+ C- Research, Technology and Science - Unicomfacauca, vol. 1, no. 10, Dec. 2016, pp. 47-55, https://revistas.unicomfacauca.edu.co/ojs/index.php/itc/article/view/itc2016_pag_47_55.