1. Faculty of Geography, Department for Physical Geography and Landscape Science, Lomonosov Moscow State University, Moskva, Russia
2. Department of Geosciences and Natural Resource Management (IGN), University of Copenhagen, Øster Voldgade, Denmark
3. Structural Development of Farms and Rural Areas, Leibniz Institute of Agricultural Development in Transition Economies (IAMO), Halle (Saale), Germany
4. Geography Department, Humboldt-Universität zu Berlin, Berlin, Germany