↑ Nordhoff, Sebastian; Hammarström, Harald; Forkel, Robert và đồng nghiệp biên tập (2013). “Church Slavic”. Glottolog. Leipzig: Max Planck Institute for Evolutionary Anthropology. Gợi ý |số biên tập viên= (trợ giúp)
↑ Carl Waldman, Catherine Mason. Encyclopedia of European Peoples: Facts on File library of world history. Infobase Publishing, 2006. p. 752. ISBN 9781438129181... There is disagreement as to whether Cyril and his brother Methodius were Greek or Slavic, but they knew the Slavic dialect spoken in Macedonia...
↑ Dmitrij Cizevskij. Comparative History of Slavic Literatures, Vanderbilt University Press (2000) p. 27
↑ after the Slavs invaded it. Florin Curta & Paul Stephenson, Southeastern Europe in the Middle Ages, 500-1250, Cambridge University Press, 2006, p 214: "At the emperor’s request, Constantine and his brother started the translation of religious texts into Old Church Slavonic, a literary language most likely based on the Macedonian dialect allegedly used in the hinterland of their home-town, Thessalonica."
