Search for: [References = "3. Balon J., 2006. Stability of the natural environment as a subject of geoecological research \[in\:\] A. Richling, B. Stojek, M. Strzyż, I. Szumacher, A. Świercz \(eds.\), Regionalne Studia Ekologiczno\-Krajobrazowe. Problemy Ekologii Krajobrazu, vol. 16, no. 1, pp. 101\-114."]