李立. 董文渙《聲調四譜圖説》辯疑: A Criticism of Tung Wen-huan’s Four Charts of Tones Sequence. sinohumanitas [Internet]. 2001 Sep. 1 [cited 2024 Jul. 29];8:175-94. Available from: https://ejournals.lib.hkbu.edu.hk/index.php/sinohumanitas/article/view/2371