Sirbya: Novi Sad Beograd Rumanya: Galati Gottmann, Jean, A Geography of Europe, New York, 1969, Holt, Rinehart & Winston Edit., 4th edition Johann Strauss
Events. Iub.edu Päring LINGUAE andmebaasist. Keelte nimetused. Eki.ee ISO 639 code sets. Sil.org Endangered languages in Europe and North Asia. Helsinki.fi
Tilpa Wilcannia Menindee Pooncarie Wentworth Gottmann, Jean, A Geography of Europe, New York, 1969, Holt, Rinehart & Winston Edit., 4th edition Ralph Darling