1. Zhu, Xiaonong & Wang, Caiyu (2015) Tone. In Wang & Sun (eds.) (2015), pp. 503–515.
2. Zhang, Ling (2013) Intonation effects on Cantonese lexical tones in speaking and singing. Unpublished PhD dissertation, Hong Kong Polytechnic University.
3. Tone Sandhi and Tonal Coarticulation in Tianjin Chinese