Found in articles
Moscow Open 2008 Archived 11 అక్టోబరు 2016 at the Wayback Machine. FIDE. "Plovdiv: Playoffs of the European Individual Championships". ChessBase. 4 May 2008
Novinite. 14 January 2008. Retrieved 20 December 2011. "Bulgaria's Sofia, Plovdiv Suffer Worst Air Pollution in Europe". Novinite. 23 June 2010. Retrieved