^Lee, Ernest Wilson (1966). Structure of Northern Roglai as a representative Chamic language. In Proto-Chamic Phonologic Word and Vocabulary: Bloomington: Indiana University. pp. 21–69.
^Brunelle, Marc; Brown, Jeanne; Thu Hà, Phạm Thị (2022). Northern Raglai voicing and its relation to Southern Raglai register: evidence for early stages of registrogenesis. In Phonetica 79, Vol 2. pp. 151–188.{{cite book}}: CS1 maint: location (link) CS1 maint: location missing publisher (link)