 His research focused on studies of the Altaic language family, especially Khalkha-Mongolian and Buriat-Mongolian, and on studies of the folklore of these and related languages.He wrote manuals and grammars of written and colloquial Khalkha-Mongolian and Buriat-Mongolian, Yakut, the Alar dialect, and Bashkir.His publications in the realm of Mongolian oral literature include eleven volumes of Mongolian epics, collections of Mongolian sayings, songs, and fairy tales, and Mongolian versions of works in Sanskrit.