Analysts warn that if the opposition SYRIZA wins, it may reverse the austerity policy in exchange for the country's international bailout and cause a run on banks and an exit from the Eurozone.
Balkan countries expect greater assistance and support from the EU and NATO to counter human trafficking.
The two countries signed a memorandum of understanding to advance collaboration between their prosecutors' offices.
A recent agreement between BiH and EUROPOL will increase security in the Balkan nation.
Balkan countries have adopted an action plan against illicit trafficking of weapons.
Thousands of illegal immigrants use the Balkan countries as a stepping stone to move into EU member countries.
Police in Serbia and Bosnia and Herzegovina joined forces to arrest 15 individuals suspected of war crimes, showing the importance of regional co-operation.
Military co-operation between the two countries is important due to the threats from ISIL, experts say.
A recent NATO initiative in Belgrade is helping to educate the region's youth about democracy, stability and co-operation in the global fight against ISIL.
By co-operating with NATO, Serbia will see improvement in its defence system and security sector reforms, officials and experts said.
Serbia, Macedonia and Montenegro are joining an OSCE initiative that aims to increase the countries' abilities to fight organised crime and terrorism.
New projects in the region will help to protect legal migrants' human rights.
Publishing the census results will strengthen political transparency and enhance BiH's fragile economy.
Serbia and Romania are the perfect model of bilateral co-operation, experts say.
Fostering human rights is one of the key requirements for candidate countries to join the EU.