Katia Chirkova 齐卡佳 and Han Zhengkang 韩正康. Shiyong Duoxu yu yufa 实用多续语语法 (Practical Grammar of Duoxu). Beijing 北京: Minzu chubanshe 民族出版社, 2016. ISBN 978-7-105-14749-6.
This book, written with the assistance of Han Zhengkang, is the first-ever comprehensive grammar of the critically endangered Duoxu language. Written in the form of a textbook, it is a step-by-step introduction to the phonology, lexicon, and morpho-syntax of Duoxu. The accompanying CD offers the pronunciation of exercises.
Local language communities are of great importance for linguistic research, as members provide words, phrases, and even entire stories in the language that is being documented or studied. To give back to the local community, copies of this book and the accompanying cd were given as a present to local language consultants in Mianning, Sichuan Province, People's Republic of China, in November 2017, as a token of appreciation for their help in the creation of this book. Here and here are pictures of the ceremony, organized by professor Wang Dehe of Xichang College.