Ciro, Erwin, Jorge Parra, Manuel Zapata, and Edwin A Murillo. 2015. “Effect of the Recycled Rubber on the Properties of Recycled Rubber Recycled Polypropylene Blends”. Ingeniería Y Ciencia 11 (22): 173-88. https://doi.org/10.17230/ingciencia.11.22.8.