Baatar, "Old Turkic Script", Ulan-Baator (2008), ISBN 0-415-08200-5* M. Erdal, "A Grammar of Old Turkic", Handbook of Oriental Studies, Section 8 Uralic & Central Asia, Brill, Leiden (2004), ISBN 90-04-10294-9.
Baatar, "Old Turkic Script", Ulan-Baator (2008), ISBN 0-415-08200-5*M. Erdal, "A Grammar of Old Turkic", Handbook of Oriental Studies, Section 8 Uralic & Central Asia, Brill, Leiden (2004), ISBN 90-04-10294-9.