Cuali-Álvarez, I., Pavón-Romero, S. H. and Colín-Cruz, A. (2011) “Production of gibberellic acid from Gibberella fujikuroi using municipal sewage sludge as a substrate”., Universitas Scientiarum, 16(1), pp. 51–62. doi: 10.11144/javeriana.SC16-1.poga.