Xiongnu or Hsiung-nu in Wiktionary, the free dictionary. Wikisource has the text of the 1911 Encyclopædia Britannica article "Hiung-nu". Material Culture...
206–265. Retrieved 2011-02-06. Shiratori, Kurakichi, Uber die Sprache des Hiung-nu Stammes und der Tung-hu-Stdmme, Tokyo, 1900 Ramstedt G.J., "Zur Frage nach...