Characteristics of radioactivity in the surface air along the 45°N zonal belt in South-Eastern Europe - J. Ajtić; B. Zorko; M. Nečemer; D. Sarvan; M. Rajačić; J. Krneta Nikolić; D. Todorović; V. Djurdjevic; B. Vodenik; D. Glavič Cindro; J. Kožar Logar (International Journal of Environmental Science and Technology, 2022)