• [Wiki] http://en.wikipedia.org/wiki/Natrix_natrix.
• [AnAge] http://genomics.senescence.info/species/entry.php?species=Natrix_natrix.
• [Kooy2010] Kooijman, S. (2010). Dynamic Energy Budget theory for metabolic organisation. Cambridge Univ. Press, Cambridge.
• [Mads1983] Madsen, T. (1983). Growth rates, maturation and sexual size dimorphism in a population of grass snakes, Natrix natrix, in Southern Sweden. Oikos, 40:277--282.