Betleja, Jacek, Waga, Jan Maciej, Wilczek, hab. Zbigniew, Fajer, Maria, RZETALA, Mariusz (2013). THE UPPER VISTULA VALLEY NATURA 2000 AREA A KEY ELEMENT OF THE MOST IMPORTANT ECOLOGICAL CORRIDOR IN CENTRAL EUROPE. SGEM International Multidisciplinary Scientific GeoConference EXPO Proceedings; 13th SGEM GeoConference on ECOLOGY, ECONOMICS, EDUCATION AND LEGISLATION, 1085 - 1092 pp. https://doi.org/10.5593/sgem2013/be5.v1/s20.142