"Vucic, Thaci to face most contentious, disruptive topics"

But, this peace "will be tested in negotiations between Serbia and Kosovo as they work to normalize their relationship, especially by a controversial idea for swapping territory that could have destabilizing effects in the region," says a Stratfor report.

The organization, which Tanjug quoted in a a report and described as dealing with geopolitical analyses, also states "one of the most contentious topics on the agenda of the coming negotiations is the creation of a Community of Serb Municipalities," known in Serbian by its "ZSO" acronym.

The ZSO, Stratfor continues, is an idea "broached in 2013, but little progress in implementing it has been made since."

Another, "potentially even more disruptive" topic will be "a possible border adjustment" - something indicated in recent weeks by Serbian President Aleksandar Vucic and his Kosovo counterpart Hashim Thaci.

And while "the leaders did not specify what territories would be included in such an agreement," it is "broadly believed that it would involve the transfer of Northern Kosovo, where ethnic Serbs are a majority, to Serbian control and the Presevo Valley, where ethnic Albanians are a majority, to Kosovo."

"The idea of a territory swap, which would make Serbia and Kosovo more ethnically homogeneous, has been floated in academic and political circles since the 1990s. Opposition parties and politicians on both sides have condemned the proposal, which, some fear, could embolden ethnic nationalists elsewhere in the Balkans (...) but at this point, it's unclear what territories the border adjustments mentioned by Vucic and Thaci would actually include," the analysis said.

The text further remarks that in the negotiations "each side likely will push to...