[RETRACTED] Parasites from the fish Clarias gariepinus as potential biondicators for heavy metal pollution in freshwater systems. UNED Res. J. [Internet]. 1 de diciembre de 2012 [citado 31 de julio de 2026];4(2):165-73. Disponible en: https://revistas.uned.ac.cr/index.php/cuadernos/article/view/4