Earth sciences; Climate change; Economic geology; Physical geography; Sustainable development Part I Global Problems and Mountain Regions; Scientific Research Basis for Sustainable Development of the Mountain Regions: Main Concepts and Basic Theories ; Mariyana Nikolova; Solar Activity, Climate Change, and Natural Disasters in Mountain Regions ; Milan Radovanovic; Mass Movement Processes Under; Changing Climatic and Socioeconomic Conditions ; Karl Hagen and Peter Andrecs; Part II Nature Resources and Land Use in Mountain Regions; Mountains and Mountain Regions in Bulgaria ; Yulia Kroumova; The Nature Potential of Mountainsin Bulgaria and Its Sustainable Use ; Marina Yordanova and Zoya Mateeva; Morphometry and Land Use on High Mountains in the Republic of Macedonia ; Ivica Milevski; Usage of the Mountain Areas in the Republic of Macedonia ; Mirjanka Madzevic and Biljana Apostolovska Toshevska; Physical Geographic Characteristics and Sustainable Development of the Mountain Area in Montenegro ; Predrag Djurović and Mirela Djurović; Sustainable Development in the Eastern Black; Sea Mountains: Present State and Perspectives ; Mehmet Somuncu; Regional Differences and Regional Planning of Economic Activities in Bosnia and Herzegovina ; Rahman Nurković and Haris Jahić; Part IV Nature Protection, Conservation and Monitoring; Applying Integrated Nature Conservation Management: Using Visitor Management and Monitoring to Handle Conflicts Between Winter Recreation and Grouse Species in Berchtesgaden National Park ; Sabine Hennig and Michaela Künzl; Environmental Changes in the Maramureş Mountains Natural Park ; Dan Bălteanu , Mihaela Năstase , Monica Dumitraşcu , and Ines Grigorescu; BEO Moussala: Complex for Environmental Studies ; Christo Angelov , Nina Nikolova , Todor Arsov , Ivo Kalapov , Assen Tchorbadjieff , Ilia Penev , and Ivo Angelov; Research of Field Evidence for Late Quaternary Climate Changes in the Highest Mountains of Bulgaria ; Emil Gachev; Part V Networks and Strategies for Mountain Regions 26 Models and Strategies for Sustainable Management of Mountain Territories in Central and Southeastern Europe ; Georgi Zhelezov; ; Astrid Björnsen Gurung