Zirino, A.; Hernandez-Ayon, M.; A.Fuhrmanr, R.; Alvarez-Borrego, S.; Gaxiola-Castro, G.; Lara-Lara, J.; Bernstein, R. Estimate of Surface PCO2, in the Gulf of California from Underway PH Measurements and Satellite Imagery. Cienc. Mar. 1997, 23, 1-22.