@ARTICLE{Nawrocka_Lidia_12._2011,
 author={Nawrocka, Lidia and Kobos, Justyna},
 volume={Vol. 53},
 number={Iss. 3},
 journal={Oceanologia},
 howpublished={online},
 year={2011},
 publisher={Instytut Oceanologii PAN},
 publisher={Komitet Badań Morza PAN},
 title={12. The trophic state of the Vistula Lagoon: an assessment based on selected biotic and abiotic parameters according to the Water Framework Directive:},
 URL={http://ochroma.man.poznan.pl/Content/99983/mainfile.pdf},
}