• [Wiki] https://en.wikipedia.org/wiki/Percina_maculata.
• [fishbase] https://www.fishbase.se/summary/Percina-maculata.html.
• [Karr1963] Karr, J. R. (1963). Age, growth, and food habits of johnny, slenderhead and blacksided darters of boone county, Iowa. Proceedings of the Iowa Academy of Science, 70:228--236.
• [Kooy2010] Kooijman, S. (2010). Dynamic Energy Budget theory for metabolic organisation. Cambridge Univ. Press, Cambridge.