Ángel Borja, Javier Franco, Victoriano Valencia, Juan Bald, Iñigo Muxika, Marı́a Jesús Belzunce, Oihana Solaun,
Implementation of the European water framework directive from the Basque country (northern Spain): a methodological approach. Marine Pollution Bulletin. ,vol. 48, pp. 209- 218 ,(2004) ,
10.1016/J.MARPOLBUL.2003.12.001