Donald L. Philippi (1979). Songs of gods, songs of humans : the epic tradition of the Ainu. Princeton, N.J.: Princeton University Press. ISBN978-1-4008-7069-1. OCLC904547563.
Strong, Sarah Mehlhop (2011). Ainu spirits singing : the living world of Chiri Yukie's Ainu shin'yōshū. Honolulu: University of Hawaii Press. ISBN978-0-8248-6012-7. OCLC798295761.