Fúquene-Retamoso, Carlos Eduardo, Nazly Bibiana Córdoba-Pinzón, Jaime Andrés Lara-Borrero, and Sandra Méndez-Fajardo. 2009. “Evaluation of Environmental Impact Diminution When Recycled Material Is Used for Threaded Unions”. Ingenieria Y Universidad 13 (1). https://revistas.javeriana.edu.co/index.php/iyu/article/view/951.