• [Wiki] https://en.wikipedia.org/wiki/Etheostoma_gracile.
• [fishbase] https://www.fishbase.se/summary/Etheostoma-gracile.html.
• [BraaSmit1967] Braasch, M. E. and Smith, P. W. (1967). The life history of the slough darter, Etheostoma gracile, (Pisces, Percidae. Technical report, Dept Energy and Natural Resources; Illinois Institute for Natural Resources.
• [Kooy2010] Kooijman, S. (2010). Dynamic Energy Budget theory for metabolic organisation. Cambridge Univ. Press, Cambridge.