Mokoginta, I. et al. 2007. The Improvement of Protein Retention through a Higher Utilization of Carbohydrate in the Diet with Chromium for Common Carp Cyprinus carpio Linn. Jurnal Akuakultur Indonesia. 3, 2 (Aug. 2007), 37–41. DOI:https://doi.org/10.19027/jai.3.37-41.