Sastoque-Cala, L., Cotes-Prado, A. M., Rodríguez-Vázquez, R. and Pedroza-Rodríguez, A. M. (2010) “Effect of nutrients and fermentation conditions on the production of biosurfactants using rhizobacteria isolated from fique plants”, Universitas Scientiarum, 15(3), pp. 251–264. doi: 10.11144/javeriana.SC15-3.eona.