• [Wiki] http://en.wikipedia.org/wiki/Cottus_extensus.
• [fishbase] https://www.fishbase.se/summary/Cottus-extensus.html.
• [Kooy2010] Kooijman, S. (2010). Dynamic Energy Budget theory for metabolic organisation. Cambridge Univ. Press, Cambridge.
• [RuzyWurt1998] Ruzycki, J. R., Wurtsbaugh, W. A., and Lay, C. (1998). Reproductive ecology and early life history of the lacustrine sculpin, Cottus extensus (Teleostei, Cottidae. Envir. Biol. Fishes, 53:117--127.