Kirjassof, Alice Ballantine (March 1920). "Formosa the Beautiful". The National Geographic Magazine. Vol. 37, no. 3. p. 290 – via Internet Archive.
doi.org
Mei, Tsu-lin (1970), "Tones and prosody in Middle Chinese and the origin of the rising tone", Harvard Journal of Asiatic Studies, 30: 86–110, doi:10.2307/2718766, JSTOR2718766
Mei, Tsu-lin (1970), "Tones and prosody in Middle Chinese and the origin of the rising tone", Harvard Journal of Asiatic Studies, 30: 86–110, doi:10.2307/2718766, JSTOR2718766