Encyclopædia Britannica – Dost Mohammad Khan, "ruler of Afghanistan (1823–63) and founder of the Barakzay dynasty, who maintained Afghan independence during a time when the nation was a focus of political struggles between Great Britain and Russia..."
One or more of the preceding sentences incorporates text from a publication now in the public domain: Chisholm, Hugh, ed. (1911). "Dost Mahommed Khan". Encyclopædia Britannica (به انگلیسی). Vol. 8 (11th ed.). Cambridge University Press. p. 438.