Zapata-Sierra, A.J., F. Manzano-Agugliaro, and J.L. Ayuso Muñoz. 2009. “Assessment of Methods for Obtaining Rainfall Intensity-Duration-Frequency Ratios for Various Geographical Areas”. Spanish Journal of Agricultural Research 7 (3), 699-705. https://doi.org/10.5424/sjar/2009073-455.