Vail, Peter (2007). "Thailand's Khmer as 'invisible minority': Language, ethnicity and cultural politics in north-eastern Thailand". Asian Ethnicity. 8 (2): 111–130. doi:10.1080/14631360701406247. S2CID144401165.
Vail, Peter (2007). "Thailand's Khmer as 'invisible minority': Language, ethnicity and cultural politics in north-eastern Thailand". Asian Ethnicity. 8 (2): 111–130. doi:10.1080/14631360701406247. S2CID144401165.