“The Effect of High Rearing Densities on the Growth of Juveniles of the Cichlid, Cichlasoma Managuense (Günther, 1869) (ESP)”. Uniciencia, vol. 9, no. 1, Jan. 1992, pp. 33-39, https://www.revistas.una.ac.cr/index.php/uniciencia/article/view/5450.