Tovar, LR; Gutiérrez, ME; Cruz, G (2002). "Fluoride content by ion chromatography using a suppressed conductivity detector and osmolality of bitterns discharged into the Pacific Ocean from a saltworks: feasible causal agents in the mortality of green turtles (Chelonia mydas) in the Ojo de Liebre lagoon, Baja California Sur, Mexico". Anal Sci. 18 (9): 1003–7. doi:10.2116/analsci.18.1003. PMID12243394.
Tovar, LR; Gutiérrez, ME; Cruz, G (2002). "Fluoride content by ion chromatography using a suppressed conductivity detector and osmolality of bitterns discharged into the Pacific Ocean from a saltworks: feasible causal agents in the mortality of green turtles (Chelonia mydas) in the Ojo de Liebre lagoon, Baja California Sur, Mexico". Anal Sci. 18 (9): 1003–7. doi:10.2116/analsci.18.1003. PMID12243394.