Feasibility study for the creation of an eco-friendly block factory using coffee husk ash and corn husks in the municipality of Pamplona, Norte de Santander. Ingeniería, Sostenibilidad y Sociedad, [S. l.], v. 1, n. 3, p. 1–8, 2022. Disponível em: https://ojs.unipamplona.edu.co/index.php/iss/article/view/2408. Acesso em: 16 oct. 2025.