1. Directive of the European Parliament and of the Council of 23 October 2000 establishing a framework for Community action in field of water policy;Official Journal of the European Communities,2000
2. Improvement of water quality of the River Odra in the years 1997–2002 as the result of realization of the quick operation programme;Dubicki,2003
3. The quality of transboundary rivers in Poland according to the use of assessment methods in Europe;Korol,1997
4. Report RIZA. (1996). Current practice in monitoring and assessment of rivers and lakes, vol. 2. In UN/ECE Task Force on Monitoring and Assessment. Report No. 95.065, Lelystad, Netherlands.
5. Report RIZA. (2000). Guidelines on water-quality monitoring and assessment of transboundary rivers. First review of the 1996 on guidelines on water-quality monitoring and assessment of transboundary rivers. Lelystad, Netherlands.