[1. Water Framework Directive;]Search in Google Scholar
[2. Regulation of the Minister of the Environment of July 21, 2016 on the method of classification of the state of surface water bodies and environmental quality standards for priority substances;]Search in Google Scholar
[3. Kudelska D, Jabłoński J, Zakrzewska E. Methodology for the measurement and assessment of the cleanliness of lakes – guidelines, Ministerstwo Administracji, Gospodarki Terenowej i Ochrony Środowiska. Warsaw; 1975: p. 59;]Search in Google Scholar
[4. Kudelska D, Cydzik D, Soszka H. Implementation instructions for the system of evaluation of the quality of lakes. Instytut Kształtowania Środowiska, Zakład Użytkowania Wód; Warsaw: 1980;]Search in Google Scholar
[5. Kudelska D, Cydzik D, Soszka H. Lake quality evaluation system. Instytut Kształtowania Środowiska; Warsaw: 1983: p. 44;]Search in Google Scholar
[6. Kudelska D, Cydzik D, Soszka H. 1992, Guidelines for the basic monitoring of lakes, PIOŚ, Warsaw, 41 s.]Search in Google Scholar
[7. Kudelska D, Cydzik D, Soszka H. 1994, Guidelines for the basic monitoring of lakes, PIOŚ, Warsaw.;]Search in Google Scholar
[8. Choiński A; Lakes of the globe; Publ. PWN; 2000 Warsaw;]Search in Google Scholar
[9. Lampert W, Sommer U; Ecology of inland waters; Publ. PWN; 1996 Warsaw;]Search in Google Scholar
[10. Skowron R., 2008, Water thermal conditions during winter stagnation in the selected lakes in Poland, Limnological Review, 8 (3), 119-128;]Search in Google Scholar
[11. Lange W, 1985, Thermical regimes of Cassubian Lake District, Zeszyty Naukowe BiNoZ UG, Geografia, Gdańsk, 13, 57-77.];]Search in Google Scholar
[12. Skowron R, 2011, The differentiation and the changeability of chosen of elements the thermal regime of water in lakes on Polish Lowland, Wydawnictwo Uniwersytetu M. Kopernika, Toruń, p. 345;]Search in Google Scholar
[13. Skowron R, 2007, The thermocline layer in the thermal water structure of selected Polish lakes, Limnological Review 7 (3), 161-169;]Search in Google Scholar
[14. Jańczak J, Maślanka W, 2006, Cases of occurrence of secondary metalimnia in some lakes of the Ełk Lakeland, Limnological Review, 6, 123-128;]Search in Google Scholar
[15. Maślanka W, Nowiński K, 2006, Diversity of development of summer thermocline layer in Lake Upper Raduńskie, Limnological Review, 6, 201-206.];]Search in Google Scholar
[16. Sobolewski W, Borowiak D, Borowiak M, Skowron R, 2014, Database of Polish lakes and its use in limnological studies. Uniwersytet Marii Curie-Skłodowskiej Wydział Nauk o Ziemi i Gospodarki Przestrzennej. PICADOR Komunikacja Graficzna s.c. Lublin;]Search in Google Scholar
[17. Kajak Z; Hydrobiology-limnology. The ecosystems of inland waters; Publ. PWN; 1998 Warsaw;]Search in Google Scholar
[18. Oleksowicz A, (1981) Assessment of the surface water quality in Lake Charzykowskie based on phytoplankton analysis. Zakład Kształtowania i Ochrony Środowiska. ATR w Bydgoszczy;]Search in Google Scholar
[19. Wiśniewska M, (1994) Phytoplankton dynamics in Lake Charzykowskie in 1987-1990. Wydawnictwo UAM Poznań;]Search in Google Scholar
[20. Wiśniewska M., (1996) Changes In the phytoplankton of Lake Charzykowskie In relation to the environmental factors. [in:] BoryTucholskie – Biosphere Conservation. University of Łódz;]Search in Google Scholar
[21. Wiśniewska M., Luścińska M., (2012) Long-term changes in the phytoplankton of Lake Charzykowskie. Oceanological and Hydrobiological Studies. International Journal of Oceanography and Hydrobiology. Volume 41, Issue3;10.2478/s13545-012-0031-1]Search in Google Scholar
[22. Stangenberg M., et al., 1950. Morphometry and chemical composition of water in Lake Charzykowo. Lake Charzykowo I. Państwowe Wydawnictwo Rolnicze i Leśne. Warsaw;]Search in Google Scholar
[23. Solski A. 1964. Limnological profile of Lake Charzykowskie and Lake Wdzydze. Polskie Archiwum Hydrobiologiczne, TOM XII (XXV) No. 2.]Search in Google Scholar
[24. Szulkowska-Wojaczek E., 1978. Eutrophication of lakes and indicators of its progress (30-year impact of waste water in the town of Chojnice on the pollution of Lake Charzykowo and the eutrophication progress. Zeszyty Naukowe Akademii Rolniczej we Wrocławiu Nr 14. Wrocław;]Search in Google Scholar
[25. Cieściński J., Ciechalski J., Borsuk S., Dąbkowski R., Chodakowski K., Wiśniewska M., Evaluation of purity of 25 chosen lakes of the Zaborski Landscape Park on the basis of Physico-chemicalparameters”. Wydawnictwo Uniwersytetu Łódzkiego. Łódź 1996;]Search in Google Scholar
[26. Nowicka B., Nadolna A. Goszczyński J., Bojakowska I., Gliwicz T. Charzykowskie Lake, First report, Influence of stressors of Charzykowskie Lakes, program EULAKE, Warsaw 2011;]Search in Google Scholar
[27. Kondracki J., 2011, Regional geopgraphy of Poland, Wyd. Nauk. PWN, Warsaw, p. 468;]Search in Google Scholar
