• [Wiki] http://en.wikipedia.org/wiki/wiki/Umbra_pygmaea.
• [fishbase] https://www.fishbase.se/summary/Umbra-pygmaea.html.
• [Kooy2010] Kooijman, S. (2010). Dynamic Energy Budget theory for metabolic organisation. Cambridge Univ. Press, Cambridge.
• [PaneWeis2012] Panek, F. M. and Weis, J. S. (2012). Age, growth, and reproduction of the eastern mudminnow (Umbra pygmaea) at the Great Swamp National Wildlife Refuge, New Jersey. Northeastern Naturalist, 19:217--228. doi:10.1656/045.019.0206.