语言科学
再论粤语用于求证是非问的“啊”
单韵鸣
Revisit on the a21 and a13  Used in the Confirmation Question in Cantonese
Shan Yunming
语言科学 . 2018, (6): 643 -653 .  DOI: 10.7509/j.linsci.201801.031891