Ćirković, SRBI MEĐU EUROPSKIM NARODIMA,(Serbs) 2008. http:// www.mo-vrebac-pavlovac.hr/attachments/article/451/ Sima%20%C4%86irkovi%C4%87%20SRBI%20ME%C4%90U%20EVROPSKIM%20NARODIMA.pdf Archived 2020-01-08 at the Wayback Machine (in Latvian)