Sastoque-Cala, L., A. M. Cotes-Prado, R. Rodríguez-Vázquez, and A. M. Pedroza-Rodríguez. “Effect of Nutrients and Fermentation Conditions on the Production of Biosurfactants Using Rhizobacteria Isolated from Fique Plants”. Universitas Scientiarum, vol. 15, no. 3, Nov. 2010, pp. 251-64, doi:10.11144/javeriana.SC15-3.eona.