V. Stojanović, J. . Delić, R. . Perić, J. Dunjić, and S. Obradović, “Developing ecological indicators of sustainable tourism in new protected areas: a case study of saline steppe and forest steppe habitats in Serbia”, turizam, vol. 26, no. 2, Sep. 2021, doi: 10.5937/turizam26-30898.