Bezbednosni problemi kretanja i boravka stranaca na teritoriji SAP Vojvodine : analiza izveštaja pokrajinske sluîbe drîavne bezbednosti iz 1981. godine

During the whole period of Communist regime in Serbia, State Security worked on keeping track of all suspicious categories of state enemies, especially foreign citizens or people who were in frequent contact with them. At the beginning of the 80s, on the territory of Vojvodina, those were mostly the members of Hungarian and German nationality, as well as other people who travelled a lot and had contacts with foreigners. In those days that kind of activity was subversive itself. For that reason secrete police monitored all forms of such suspicious communication and sent reports about it.