REFERENCES
- Catalan J., Ventura M., Munné A. and Godé L. (2003) Desenvolupament d'un index integral de qualitat ecològica i regionalització ambiental dels sistemes lacustres de Catalunya. Agencia Catalana del Aigua. Generalitat de Catalunya.
- Clabby K.J., Lucey J. and McGarrigle M. (1982) The National Survey of Irish Rivers. River Quality Investigations Biological. Results of the 1980 and 1981 Investigations. An Foras Forbartha. Dublin, Ireland.
- European Commission (2000) Directive 2000/60/EC of the European Parliament and of the Council—Establishing a framework for Community action in the field of water policy. Brussels, Belgium.
- Flanagan P.J. and Toner P.F. (1972) The National Survey of Irish Rivers. A Report on Water Quality, An Foras Forbartha. Dublin, Ireland.
- Karr J.R. (1981) Fisheries 6, 21–27.
- Kohler A. (1978) Landschaft & Stadt 10, 2, 73–85.
- Regulation 13 from 2.04.2007 towards characterization of surface waters (2007) In: State Gazette, 37.
- Schaumburg J., Schranz C., Stelzer D. and Hofmann G. (2007) Action Instructions for the ecological Evaluation of Lakes for Implementation of the EU Water Framework Directive: Makrophytes and Phytobenthos, Bavarian Environment Agency.
- Schaumburg J., Schranz C., Stelzer D., Hofmann G., Gutowski A. and Foerster J. (2006) Instruction Protocol for the ecological Assessment of Running Waters for Implementation of the EC Water Framework Directive: Macrophytes and Phytobenthos, Bavarian Environment Agency.
- Wallin M., Wiederholm T. and Johnson R.K. (2003) Guidance on establishing reference conditions and ecological status class boundaries for inland surface waters. REFCOND, p. 93.