• [Wiki] http://en.wikipedia.org/wiki/Erpobdelliformes.
• [GoveBain2003] Govedich, F. R., Bain, B. A., Burd, M., and Davies, R. W. (2003). Reproductive biology of the invasive Asian freshwater leech Barbronia weberi (Blanchard, 1897). Hydrobiologia, 510:125--129.
• [Kooy2010] Kooijman, S. (2010). Dynamic Energy Budget theory for metabolic organisation. Cambridge Univ. Press, Cambridge.