• [Wiki] https://en.wikipedia.org/wiki/Etheostoma_juliae.
• [fishbase] https://www.fishbase.se/summary/Etheostoma-juliae.html.
• [JameTabe1986] James, P. W. and Taber, C. A. (1986). Reproductive biology and age and growth of the Yoke darter, Etheostoma juliae. Copeia, 1986(2):536--540. doi:10.2307/1445017.
• [Kooy2010] Kooijman, S. (2010). Dynamic Energy Budget theory for metabolic organisation. Cambridge Univ. Press, Cambridge.