1. DIRECTIVE 2000/60/EC OF THE EUROPEAN PARLIAMENT AND OF THE COUNCIL of 23 October 2000 establishing a framework for Community action in the field of water policy.
https://eur-lex.europa.eu/resource.html?uri=cellar:5c835afb-2ec6-4577-bdf8-756d3d694eeb.0004.02/DOC_1&format=PDF
. Accessed 14 Feb 2019
2. Common Implementation Strategy for the Water Framework Directive (2009) Guidance Document No.19: Guidance on surface water chemical monitoring under the Water Framework Directive.
https://circabc.europa.eu/sd/a/e54e8583-faf5-478f-9b11-41fda9e9c564/Guidance%20No%2019%20-%20Surface%20water%20chemical%20monitoring.pdf
. Accessed 14 Feb 2019
3. Allan IJ, Vrana B, Greenwood R, Mills GA, Roig B, Gonzalez C (2006) A “toolbox” for biological and chemical monitoring requirements for the European Union’s Water Framework Directive. Talanta 69:302–322
4. Allan IJ, Mills GA, Vrana B, Knutsson J, Holmber A, Guigues N, Laschi S, Fouillac AM, Greenwood R (2006) Strategic monitoring for the European Water Framework directive. TrAC 25:704–715
5. Strosser P (2006) Méthodes alternatives de mesure de la qualité chimique de l’eau—Mais qu’en pensent nos voisins européens?. SWIFT-WFD Workshop, Paris (available on request)