Volume 5 (2019) Serbian Journal of Geosciences Volume 5 (2019) Variation of 137Cs along the slopes of Mosna, Eastern Serbia Jelena Petrović, Boško Gajić, Ranko Dragović, Mirjana Ćujić, Ljiljana Janković Mandić, Milan Đorđević, Snežana Dragović Geoecological evaluation of Niš landscape for the purpose of sport and recreational tourism Miloš Manić, Milan Milovanović, Milan Đorđević Seasonal movements in mountain tourism of Serbia: a review of methods and literature Marija Bratić, Miha Lesjak, Milan Đorđević, Miodrag Đorđević, Aleksandar Radivojević Basic touristic potentials and further tourism development in Sokobanja Marija Mihajlović, Maja Novović