- [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.