Grzegorz Sowula (18 May 2002). "Co Zachód wie o Wschodzie i na odwrót" [What the West knows about the East and vice versa] (in Polish). Rzeczpospolitej. Archived from the original on 16 April 2013. Retrieved 31 August 2010.
Grzegorz Sowula (18 May 2002). "Co Zachód wie o Wschodzie i na odwrót" [What the West knows about the East and vice versa] (in Polish). Rzeczpospolitej. Archived from the original on 16 April 2013. Retrieved 31 August 2010.