Legeria:
Uraren marko zuzentaraua: https://eur-lex.europa.eu/
91/271/EEE Zuzentaraua: hiriko hondakin-uren arazketa: https://eur-lex.europa.eu
Europako beste proiektu batzuk:
https://life-intext.eu/
https://www.hydrousa.org/
www.enicbcmed.eu/projects/nawamed
http://www.waterharmonica.nl/index.htm
https://www.lifephoenix.eu/en/
http://www.liferenaturwat.com/
Interesgarri diren beste estekak:
https://www.iagua.es/blogs/juan-jose-salas
http://www.constructedwetland.co.uk/
https://www.sws.org/
http://wetpol.com/