• [Wiki] http://en.wikipedia.org/wiki/Lethenteron_appendix.
• [fishbase] https://www.fishbase.se/summary/Lethenteron-appendix.html.
• [ADW] https://animaldiversity.org/accounts/Lethenteron_appendix/.
• [Kooy2010] Kooijman, S. (2010). Dynamic Energy Budget theory for metabolic organisation. Cambridge Univ. Press, Cambridge.