The Croatian State Security Service Collection on the Milovan Djilas case and Djilas supporters in Croatia (Djilasovci), was handed over to the Croatian State Archives in Zagreb on an ex officio basis from the Security and Intelligence Agency of the Republic of Croatia in 2015. The documents were then also declassified. It led to increased possibilities for research into the phenomenon of cultural opposition and dissent, as well as state surveillance of such activities.

The content of the collection is entirely relevant to cultural opposition topics. It testifies to the political and ideological movements in Communist Yugoslavia/Croatia in the 1950s. It also documents the nature of the communist system of government, which was still based on a monopoly by Communist Party leaders to decide what was and  was not acceptable, i.e., permissible (Najbar-Agičić 2016, p. 136).