Wang, Xiaomei, and Yen-Hwei Lin. 2017. “A Unified Approach to Tianjin Trisyllabic Tone Sandhi: Metrical Conditions and Tonal Complexity”. Proceedings of the Linguistic Society of America 2 (June): 19:1–13. https://doi.org/10.3765/plsa.v2i0.4063.