Udvari, István (2004). "The Urbarium of Maria Theresa in the languages of the South Slavic peoples of the Hungarian Kingdom". Studia Slavica. 49 (1–2): 103–119. doi:10.1556/sslav.49.2004.1-2.7.
"Implementation of the Charter in Hungary". Database for the European Charter for Regional or Minority Languages. Public Foundation for European Comparative Minority Research. Archived from the original on 27 February 2014. Retrieved 16 June 2014.
"Home"(PDF). Central Statistical Office of Poland. Archived from the original(PDF) on 16 January 2013. Retrieved 22 March 2012.
stat.gov.rs
webrzs.stat.gov.rs
Republic of Serbia, Republic Statistical Office (24 December 2002). "Final results of the census 2002"(PDF). Archived from the original(PDF) on 6 March 2009. Retrieved 16 December 2010.
Republic of Serbia, Republic Statistical Office (24 December 2002). "Final results of the census 2002"(PDF). Archived from the original(PDF) on 6 March 2009. Retrieved 16 December 2010.
"Home"(PDF). Central Statistical Office of Poland. Archived from the original(PDF) on 16 January 2013. Retrieved 22 March 2012.
"Implementation of the Charter in Hungary". Database for the European Charter for Regional or Minority Languages. Public Foundation for European Comparative Minority Research. Archived from the original on 27 February 2014. Retrieved 16 June 2014.