Jahncke, J., and D. Zileri. “Peruvian Booby Diet Studies As Indicators of Peruvian Anchovy Stock Size Structure in the Peruvian Coast”. Boletin Instituto Del Mar Del Perú, vol. 17, no. 1-2, Dec. 1998, pp. 47-54, https://revistas.imarpe.gob.pe/index.php/boletin/article/view/180.