CHAVES TORRES, Anívar. Validation Tool for Editing and Verification Algorithms By NS Diagrams. Publicaciones e Investigación, Colombia,CO, v. 7, p. 83–87, 2013. DOI: 10.22490/25394088.1109. Disponível em: https://hemeroteca.unad.edu.co/index.php/publicaciones-e-investigacion/article/view/1109.. Acesso em: 19 jun. 2025.