Tài liệu tham khảo

WikiPedia: Ngữ chi Cơ Tu http://sealang.net/archives/huffman2/ http://sealang.net/sala/archives/pdf8/diffloth1982... http://sealang.net/sala/archives/pdf8/miller1996le... http://glottolog.org/resource/languoid/id/katu1271 http://projekt.ht.lu.se/rwaai http://li.payap.ac.th/images/stories/survey/KATUIC... http://li.payap.ac.th/images/stories/survey/KATUIC... http://li.payap.ac.th/images/stories/survey/katuic... https://www.academia.edu/1540083/The_Katuic_Langua... https://www.academia.edu/1540105/Classifying_the_A...