Matisoff, James A. (1973). 'Tonogenesis in Southeast Asia'. In Larry M. Hyman (ed.), Consonant Types and Tone (页面存档备份,存于互联网档案馆) (Southern California Occasional
doi:10.2307/412518. Hyman, Larry. 2007. There is no pitch-accent prototype. Paper presented at the 2007 LSA Meeting. Anaheim, CA. Hyman, Larry. 2007. How