Jarnuszewski, Grzegorz, Lesław Wołejko, Tadeusz Durkowski, Robert Stańko, and Natalia Chwyć. “Sewage Management Threaten Protected Nature 2000 Habitats in the Płonia River Catchment - North-Western Poland”. Journal of Water and Land Development 67, no. 67 (December 30, 2025): 253–263. Accessed October 19, 2026. https://wydawnictwo.pan.pl/index.php/jwld/article/view/5091.