• [Wiki] http://en.wikipedia.org/wiki/Lumbricidae.
• [Butt1993] Butt, K. R. (1993). Reproduction and growth of three deep-burrowing earthworms (lumbricidae) in laboratory culture in order to assess production for soil restoration. Biol Fertil Soils, 16:135--138.
• [Kooy2010] Kooijman, S. (2010). Dynamic Energy Budget theory for metabolic organisation. Cambridge Univ. Press, Cambridge.