Water Framework Directive: The development and status of phytoplankton tools for ecological assessment of coastal and transitional waters. United Kingdom., Water Framework Directive – United Kingdom Technical Advisory Group (WFD-UKTAG). Available at: https://www.wfduk.org/sites/default/files/Media/Characterisation%20of%20the%20water%20environment/Biological%20Method%20Statements/Phytoplankton%20Technical%20Report_0.pdf., 2014.
Setting nutrient thresholds to support an ecological assessment based on nutrient enrichment, potential primary production and undesirable disturbance. Implementation of the Water Framework Directive in European marine waters, 55(1), pp.65 - 73. Available at: http://www.sciencedirect.com/science/article/pii/S0025326X06003249., 2007.