• [Wiki] http://en.wikipedia.org/wiki/Pomacea_urceus.
• [Burk1974] Burky, A. J. (1974). Growth and biomass production of an amphibious snail, Pomacea urceus (Müller), from the Venezuelan savannah. Proc. malac. Soc. Lond., 41:127--143.
• [Kooy2010] Kooijman, S. (2010). Dynamic Energy Budget theory for metabolic organisation. Cambridge Univ. Press, Cambridge.