J. López-Martínez, M. Nevárez-Martínez, R. Molina-Ocampo, and F. Manrique-Colchado, “Overlap in the type and size of the prey that compose the diet of the pacific sardine Sardinops caeruleus (Girard, 1856), thread herring Opisthonema libertate (Gunther, 1867) and northern anchovy Engraulis mordax (Girard, 1856) in the Gulf of California”, Cienc. Mar., vol. 25, no. 4, pp. 541–556, Mar. 1999.