1. Department of Landscape Architecture, Faculty of Agriculture and Forestry, University of Warmia and Mazury in Olsztyn; Prawochenskiego 17, 10-719 Olsztyn, Poland
2. Department of Land Management, Faculty of Geoengineering, University of Warmia and Mazury in Olsztyn; Prawochenskiego 15, 10-719 Olsztyn, Poland