A New Proof of the Existence of Initial Consonant Clusters in Ancient Chinese
(语言学)用舌尖向后转向硬颚的方式发音。彝语阿都话唇软颚复辅音声母比较研究
( linguistics ) pronounced with the tip of the tongue turned back toward the hard palate . Comparative Research on Labiovelar Initials in Atu Speech of Yi Language