• [Wiki] http://en.wikipedia.org/wiki/Discus_perspectivus.
• [animalbase] urlhttp://www.animalbase.uni-goettingen.de/zooweb/servlet/AnimalBase/home/species?id=1239.
• [Kooy2010] Kooijman, S. (2010). Dynamic Energy Budget theory for metabolic organisation. Cambridge Univ. Press, Cambridge.
• [Kuzn2006] Kuźnik-Kowalska, E. (2006). Life cycle of Discus ruderatus (férussac, 1821) (Gastropoda: Pulmonata: Endodontidae). Folia Malacologica, 14:35--46.
• [Will1976] Williampson, P. (1976). Size-weight relationships and field growth rates of the landsnail Cepaea nemoralis L. Journal of Animal Ecology, 45(3):875--885.