• [Wiki] http://en.wikipedia.org/wiki/Pelobates_syriacus.
• [amphibiaweb] https://amphibiaweb.org/cgi/amphib_query?where-genus=Pelobates&where-species=syriacus.
• [CogaRosi2014] Cogalniceanu, D., Rosioru, D., Szekely, P., Szekely, D., Buhaciuc, E., Stanescu, F., and Miaud, C. (2014). Age and body size in populations of two syntopic spadefoot toads (genus Pelobates) at the limit of their ranges. Journal of Herpetology, 48(4):537--545.
• [Kooy2010] Kooijman, S. (2010). Dynamic Energy Budget theory for metabolic organisation. Cambridge Univ. Press, Cambridge.