| Issue Date | Title | Author(s) | Type | Мp-cat. |
| 2018 | Analysis of characteristic novelties in the Police Law: Critical review | Leštanin, Branko; Nikač, Željko  | Article | |
| 2018 | Counter Terrorism and Migrant Crisis in Context of Criminal Low Cooperation Between Countries of the Region | Leštanin, Branko; Božić, Vanda ; Nikač, Željko  | Conference Paper | |
| 2024 | Criminal Law Protection of Private Security Officers in Serbia | Leštanin, Branko; Nikač, Željko  | Conference Paper | |
| 2019 | Fight against organised crime and some contemporary criminalistics methods | Leštanin, Branko; Nikač, Željko  | Conference Paper | |
| 2017 | Intelligence-led policing in the Ministry of Interior of the Republic of Serbia | Đurđević, Zoran ; Leštanin, Branko | Conference Paper | |
| 2019 | INTERNA KONTROLA RADA POLICIJE U SRBIJI: POLITIČKO-PRAVNI AKSPEKTI | Leštanin, Branko; Nikač, Željko  | Article | |
| 2024 | Legal aspects of police supervision of private physical security in Serbia | Leštanin, Branko; Nikač, Željko  | Conference Paper | |
| 2021 | Legislative framework and criminal operational aspect of combatingnew forms of community violence | Nikač, Željko ; Leštanin, Branko | Conference Paper | |
| 2022 | Legislativni okvir privatnog obezbeđenja u Srbiji u funkciji zaštite univerzalnih vrednosti | Nikač, Željko ; Leštanin, Branko | Conference Paper | |
| 2025 | Nadzor tehničke zaštite od strane policije u Srbiji - pravni i praktični aspekti | Leštanin, Branko; Nikač, Željko  | Conference Paper | |
| 2017 | Novi zakon o policiji i primena sredstava prinude | Nikač, Željko ; Leštanin, Branko | Article | |
| 2025 | Powers of private security officers in Serbia and human rights and freedoms: - some dilemmas and possible solution | Leštanin, Branko; Nikač, Željko  | Article | |
| 2025 | Powers of private security officers in Serbia and human rights and freedoms: Some dilemmas and possible solutions | Leštanin, Branko; Nikač, Željko  | Article | |
| 2025 | Pravni mehanizmi kontrole oružja u funkciji zaštite života - uporednopravna analiza pojedinih balkanskih država | Leštanin, Branko; Nikač, Željko  | Conference Paper | |
| 2023 | Pravni okvir zaštite života službenika privatne bezbednosti u Srbiji | Leštanin, Branko; Nikač, Željko  | Conference Paper | |
| 2024 | Private security business - state and trends in Serbia | Leštanin, Branko; Nikač, Željko  | Article | |
| 2022 | Private security regulation in Serbia and Croatia: comparative view | Leštanin, Branko; Nikač, Željko  | Conference Paper | |
| 2023 | Unlawful activities with weapons and ammunition in Serbia - some criminologocal aspects | Leštanin, Branko; Nikač, Željko  | Conference Paper | |
| 2021 | Uvođenje „amber alert“ sistema u rad policije Srbije radi zaštite života dece i maloletnika | Nikač, Željko ; Leštanin, Branko | Conference Paper | |