[
Carvalho L., Moe J., 2005, Reference conditions for selected physico-chemical elements. Chlorophyll, [in:] Reference Conditions of European Lakes. Indicators and methods for the Water Framework Directive Assessment of Reference conditions, Eds. Lyche Solheim A, REBECCA project, deliverable 7, pp. 63-71 http://www.rbm-toolbox.net/docstore/docs/3.1713.D7-uusi.pdf http://www.rbm-toolbox.net/docstore/docs/3.1713.D7-uusi.pdf
]Search in Google Scholar
[
Cydzik D., 2005, Running of computer database on Polish lake quality, Annual report, Warsaw, Institute of Environmental Protection, pp. 8, (in Polish)
]Search in Google Scholar
[
Cydzik D., Iwaniak M., Jarosiński W., Korol R., Sokołowska E. et al., 2005, Monitoring stagnant surface waters (lakes), [in:] Quality of rivers, lakes, and the Baltic Sea based on results of research performed within the framework of state monitoring programmes in 2003-2004, Warszawa, Biblioteka monitoringu środowiska, Inspekcja Ochrony Środowiska: 112-52, (in Polish with English summary)
]Search in Google Scholar
[
European Commission, 2000, 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, Official Journal of the European Communities, L 327 of 22.12.2000, pp. 72
]Search in Google Scholar
[
European Commission, 2003a, Common implementation strategy for the Water Framework Directive (2000/60/EC), Guidance document No 10, Rivers and Lakes - Typology, reference conditions and classification systems, Produced by Working Group 2.3 - REFCOND, Luxembourg, Office for Official Publications of European Communities, pp. 87
]Search in Google Scholar
[
European Commission, 2003b, Common Implementation Strategy for the Water Framework Directive (2000/60/EC), Guidance document No 6, Towards a guidance on establishment of the intercalibration network and the process on the intercalibration exercise, Produced by Working Group 2.5 - Intercalibration, Luxembourg, Office for Official Publications of the European Communities, pp.47
]Search in Google Scholar
[
Kolada A., Soszka H., Cydzik D., Gołub M., 2005, Abiotic typology of Polish lakes, Limnologica, 35: 145-5010.1016/j.limno.2005.04.001
]Search in Google Scholar
[
Kudelska D., Soszka H., Cydzik D., 1997, Polish practice in lake quality assessment, [in:] Freshwater Quality: Defining the Indefinable?, Eds. Boon P.J., Howell D.L., Edinburgh, Scottish Natural Heritage, pp. 149-54
]Search in Google Scholar
[
Lyche Solcheim A. (Eds), 2005, Reference Conditions of European Lakes. Indicators and methods for the Water Framework Directive Assessment of Reference conditions, REBECCA project, deliverable 7, pp. 105 http://www.rbm-toolbox.net/docstore/docs/3.1713.D7-uusi.pdf
]Search in Google Scholar
[
Schindler D.W., 1971, A hypothesis to explain differences and similarities among lakes in the experimental lakes area, Northwestern Ontario, J. Fish Res. Bd. Can., 28: 295-30110.1139/f71-039
]Search in Google Scholar
[
Søndergaard M., Jeppesen E., Jensen J.P., Amsinck S.L., 2005, Water Framework Directive: ecological classification of Danish lakes, Journal of Applied Ecology, 42: 616-2910.1111/j.1365-2664.2005.01040.x
]Search in Google Scholar
[
Vighi M., Chiaudani G., 1985, A simple method to estimate lake phosphorus concentration resulting from natural, background, loadings, Water Res., 19: 987-9110.1016/0043-1354(85)90367-7
]Search in Google Scholar
[
Vollenweider R.A., 1989, Global problems of eutrophication and its control, Symp. Biol. Hung., 38: 19-41
]Search in Google Scholar