Attia J, Millot S, Di-Poï C, et al. Demand feeding and welfare in farmed fish. Fish Physiol Biochem. 2012;38(1):107-18. doi:10.1007/s10695-011-9538-4

Conceição LEC, Aragão C, Dias J, et al. Dietary nitrogen and fish welfare. Fish Physiol Biochem. 2012;38(1):119-41. doi:10.1007/s10695-011-9592-y