Danka Balázs: Hypercorrect orthographic forms in the Pagan Oγuz-Nāmä: A phonetic analysis.
In: Ankara Papers in Turkish and Turkic Linguistics. Turcologica (103). Harrassowitz Verlag, Wiesbaden, Németország, pp. 543-554. (2015) ISBN 978-3-447-10523 -1