Earlier in the same century, Thomas (Thovma) Artsruni wrote History of the House of Artsruni, which, in spite of its family bias, is the chief source of information on the history of Armenia to 936; an anonymous writer continued the work to 1121.
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Tim Greenwood.T'ovma Artsruni // Christian-Muslim Relations. A Bibliographical History. (900-1050) / Edited by David Thomas and Alex Mallett. — BRILL, 2010. — Vol. 2. — P. 102.