^William H. P. Hatch, "The Subscription in the Chester Beatty Manuscript of the Harclean Gospels", The Harvard Theological Review30, 3 (1937), p. 143. JSTOR1507949
^Bromiley, Geoffrey W. (1995). The International Standard Bible Encyclopedia: Q-Z. p. 976. ISBN0-8028-3784-0. Printed editions of the Peshitta frequently contain these books in order to fill the gaps. D. Harklean Version. The Harklean version is connected with the labors of Thomas of Harqel. When thousands were fleeing Khosrou's invading armies, ...