• [Wiki] http://en.wikipedia.org/wiki/Arion_subfuscus.
• [ADW] https://animaldiversity.org/accounts/Arion_subfuscus/.
• [HutcReis2017] Hutchinson, J. M. C., Reise1, H., and Skujiené, G. (2017). Life cycles and adult sizes of five co-occurring species of Arion slugs. Journal of Molluscan Studies, 83:88--105. doi:10.1093/mollus/eyw042.
• [Kooy2010] Kooijman, S. (2010). Dynamic Energy Budget theory for metabolic organisation. Cambridge Univ. Press, Cambridge.