(ANSA) - BELGRADE, MAY 31 - If the European Union continues to isolate Kosovo, we will consider institutional initiatives or a referendum on the reunification of Kosovo with Albania, Kosovo President Hashim Thaci said today. "This could happen with the adoption of a resolution in parliament or a referendum in Kosovo and Albania, including also Presevo, Bujanovac, and Medvedja," said Thaci, cited by the Serbian media. Presevo, Bujanovac, and Medvedja are the three most important municipalities of the so-called 'Presevo Valley', an Albanian-majority region in southern Serbia, which Kosovo claims. Pristina is more and more critic of the European Union for the delays in the promised liberalization of the visa regime for Kosovar citizens. "If the EU does not want to accept two Albanian states with two flags, then it will accept only one flag," underlined President Thaci. According to Thaci, never before has the idea of correcting a historical injustice been closer, reuniting the Presevo Valley with Kosovo. (ANSA).