Ōsawa, T. “Revisiting the Ongi inscription of Mongolia from the Second Turkic Qaγanate on the basis of rubbings by G. J. Ramstedt”. Suomalais-Ugrilaisen Seuran Aikakauskirja, vol. 2011, no. 93, Jan. 2011, pp. 147–203, doi:10.33340/susa.82435.