Kolodziejski, J. ., Sanford, S. ., & Smith, G. . (2007). Stimulus frequency differentially affects chirping in two species of weakly electric fish: implications for the evolution of signal structure and function. The Journal of Experimental Biology, 210(Pt 14), 2501-9. https://doi.org/10.1242/jeb.005272

Kolodziejski, J. ., Nelson, B. ., & Smith, G. . (2005). Sex and species differences in neuromodulatory input to a premotor nucleus: a comparative study of substance P and communication behavior in weakly electric fish. Journal of Neurobiology, 62(3), 299-315. https://doi.org/10.1002/neu.20095 (Original work published 2005)