Casciotta, J., A. Almirón, L. Piálek, and O. Říčan. “Cyanocharax obi, a New Species (Characiformes: Characidae) and the First Record of the Genus from Tributaries of the río Paraná Basin, Argentina”. Zootaxa, vol. 3391, no. 1, July 2012, pp. 39–51, doi:10.11646/zootaxa.3391.1.3.