* Ilnicki, P., Melcer, B., Posiewka, P. (2003) "Point and non-point sources of pollution in the Gwda river basin in hydrological years 1992/93-1997/98" "Journal of Water and Land Development", No.
* Ilnicki, P., Melcer, B., Posiewka, P. (2003) «Point and non-point sources of pollution in the Gwda river basin in hydrological years 1992/93-1997/98» Journal of Water and Land Development, No.