Imbert-González, Josué, Octavio García-Valladares, and Reinaldo Guillen-Gordín. 2016. “Influence of Inserting Cylindrical Helices on the Critical Reynolds Number of a Flow in an Annular Space”. Chemical Technology 36 (2), 183-97. https://doi.org/10.1590/2224-6185.2016.2.%x.