GAZIVODE LAKE, Kosovo (Reuters) - Serbian President Aleksandar Vucic pledged to continue talks with Kosovo officials to resolve differences but warned it would take a long time to reach a broad deal with Pristina that could allow both nations to move towards EU membership. Expectations of an agreement that would involve a land swap, a proposal floated by both Belgrade and Pristina, dimmed after a face-to-face meeting between Vucic and his Kosovo counterpart, Hashim Thaci, was abruptly cancelled on Friday. See at: https://uk.reuters.com/article/uk-kosovo-serbia/serbias-vucic-says-long-road-ahead-in-talks-with-kosovo-idUKKCN1LO0ON