^Implementation of the Charter in Hungary. Database for the European Charter for Regional or Minority Languages. Public Foundation for European Comparative Minority Research. [2014-06-16]. (原始内容存档于2014-02-27).
^Hammarström, Harald; Forkel, Robert; Haspelmath, Martin; Bank, Sebastian (编). Ukrainian. Glottolog 2.7. Jena: Max Planck Institute for the Science of Human History. 2016.