[1] [CITE[untitled - nakamura10.pdf]], [TIME[2018-08-18T15:46:11.000Z]], [TIME[2021-12-02T08:41:53.557Z]] <http://chinese-phonology.com/pdf/nakamura10.pdf>

[2] [CITE[nakamura96.pdf]], [TIME[2018-12-08T03:51:26.000Z]], [TIME[2021-12-02T08:43:44.047Z]] <http://chinese-phonology.com/pdf/nakamura96.pdf>