Olivero Novillo, M. L., & Aguirre Pe, J. (1). Influence of roughness, aspect ratio and reynolds number on shea’r stress in channels and non-pressurized closed ducts. Revista Técnica Da Faculdade De Engenharia Da De Zulia, 28(1). Obtido de http://www.produccioncientifica.luz.edu.ve/index.php/tecnica/article/view/5870