Creation of a company producing and marketing face masks using nanotechnology in Cúcuta. Ingeniería, Sostenibilidad y Sociedad, [S. l.], v. 1, n. 2, p. 1–5, 2021. Disponível em: https://ojs.unipamplona.edu.co/index.php/iss/article/view/1018. Acesso em: 16 oct. 2025.