Slotsbo, S., (2014). Nobanis invasive alien fact sheet: Arion lusitanicus English language
Instituto Horus, (2011). Alien Invasive Species: Fact Sheets. English language
NOBANIS, (2011). North European and Baltic Network on Invasive Alien Species English language
USA, Missouri Botanical Garden, (2011). Tropicos database Missouri Botanical Garden, St. Louis, USA. English language
EPPO, (2011). PQR database European and Mediterranean Plant Protection Organization, Paris, France. English language
Global Biodiversity Information Facility (GBIF), (2011). Global Biodiversity Information Facility English language
Jørgensen, L. L., (2013). Online Database of the North European and Baltic Network on Invasive Alien Species - NOBANIS English language
Birnbaum, C., (2013). NOBANIS - invasive alien species fact sheet - Ondatra zibethicus, unpaginated. North European and Baltic Network on Invasive Alien Species - NOBANIS, English language
Fiske, P., (2012). Online Database of the North European and Baltic Network on Invasive Alien Species - NOBANIS English language
Lamarque, L. J., Delzon, S., Lortie, C. J., (2011). Biological Invasions 13(9), 1969-1989. Springer, Amsterdam, Netherlands. English language