“Changes in Species Diversity and Threats to the Avifauna of River Valleys of the Kuyavian-Pomeranian Voivodeship, Comprising Part of the International Waterway E-70 ”. Geography and Tourism, vol. 1, no. 1, Oct. 2013, pp. 101-8, https://czasopisma.ukw.edu.pl/index.php/gat/article/view/20.