Cvetković, V., Milojković, B., Mlađan, D., & Miladinović, S. (2014). The role of police in achieving security on the Danube as international waterways in Serbia. Geographical Research and Cross-Border Cooperation (pp. 42–43). Srebrno jezero. The role of police in achieving security on the Danube as international waterways in Serbia   Vladimir M. Cvetković, […]