Gong, Hwang-cherng. 1994. A Hypothesis of Three Grades and Vowel Length Distinction in Tangut. Journal of Asian and African Studies 46-47. 305-314.
@article{jacquesestimative-gong94length, author = {Gong, Hwang-cherng}, journal = {Journal of Asian and African Studies}, pages = {305-314}, title = {A Hypothesis of Three Grades and Vowel Length Distinction in Tangut}, volume = {46-47}, year = {1994} }