↑Axel Schuessler, ABC Etymological Dictionary of old chinese, University of Hawaii Press, 2006, p. 508-509.
↑Václav Blažek, A hypothetical Tocharian contribution to Chinese astronomical terminology, Hannes A. Fellner, Melanie Malzahn, and Michaël Peyrot (eds.), lyuke wmer ra - Indo-European Studies in Honor of Georges-Jean Pinault, Beech Stave Press, 2021, pp. 70-71.