Germplasm Resources Information Network (GRIN). Online Database.

USDA-ARS, (2020). Germplasm Resources Information Network (GRIN). Online Database National Germplasm Resources Laboratory, Beltsville, Maryland, USA. English language

FishBase.

Froese, R., Pauly, D., (2020). FishBase English language

Delivering Alien Invasive Species Inventories for Europe.

DAISIE, (2019). Delivering Alien Invasive Species Inventories for Europe. English language

FishBase.

Froese, R., Pauly, D., (2019). FishBase. English language

Glycosmis parviflora (flower axistree).

Rojas-Sandoval, J., (2020). Invasive Species Compendium(119817) CABI, Wallingford, UK. English language

Continuing expansion of non-indigenous crayfish species in Northern Europe: first established spiny-cheek crayfish Faxonius limosus (refinesque, 1817) population in Estonia.

Kaldre, K., Paaver, T., Hurt, M., Gross, R., (2020). BioInvasions Records 9(1), 127-132. Regional Euro-Asian Biological Invasions Centre (REABIC), Helsinki, Finland. English language

I3N Brazil invasive alien species database.

13N-Brasil, (2020). I3N Brazil invasive alien species database Horus Institute for Environmental Conservation and Development, Florianópolis - SC, Brazil. English language

North European and Baltic Network on Invasive Alien Species.

NOBANIS, (2020). North European and Baltic Network on Invasive Alien Species English language

Nonindigenous Aquatic Species Database.

US Geological Survey, (2020). Nonindigenous Aquatic Species Database US Geological Survey, Gainesville, Florida, USA. English language

Angiopteris evecta (king fern).

Rojas-Sandoval, J., (2020). Invasive Species Compendium(22973091) CABI, Wallingford, UK. English language