Hernández, José Carlos, Alberto Brito, Nayra García, María Candelaria Gil-Rodríguez, Guacimara Herrera, Alejandro Cruz-Reyes, and Jesús M. Falcón. 2006. “Spatial and Seasonal Variation of the Gonad Index of Diadema Antillarum (Echinodermata:Echinoidea) in the Canary Islands”. Scientia Marina 70 (4):689-98. https://doi.org/10.3989/scimar.2006.70n4689.