Becker AGeferson, Garcia Lde Oliveir, Kochhann D, Gonçalves JFabbrin, Loro VLucia, Baldisserotto B. Dissolved oxygen and ammonia levels in water that affect plasma ionic content and gallbladder bile in silver catfish. Ciência Rural. 2009;39(6):1768 - 1773. doi:10.1590/S0103-84782009005000132

Correa LM, Kochhann D, Becker AG, et al. Biochemistry, cytogenetics and bioaccumulation in silver catfish (Rhamdia quelen) exposed to different thorium concentrations. Aquatic Toxicology. 2008;88(4):250 - 256. doi:10.1016/j.aquatox.2008.05.003