Perry, John, "Tajik i. The Ethnonymn: Origins and Application,"Encyclopædia Iranica, Excerpt 1: "An intriguing Sogdian occurrence of the adjective tājīgāne (arguably to be pronounced as tāžīgāne) in a Manichaean hymnal from Turfan, of about the year 1000, may supply the missing link between Middle Persian tāzīg 'Arab' and Turkic/New Persian tāzik, tāžik 'Persian'.", online edition, 2009, available at http://www.iranicaonline.org/articles/tajik-i-the-ethnonym-origins-and-application (accessed on 20 July 2009)
One or more of the preceding sentences incorporates text from a publication now in the public domain: Herbermann, Charles, ed. (1913). "Melchisedechians". Catholic Encyclopedia. New York: Robert Appleton Company.