Reflexes of ɲ are rare in modern Chamiclanguages. Sidwell, Paul (2009). Classifying the Austroasiatic languages: History and state of the art(页面存档备份,存于互联网档案馆)
influence from neighbouring Mon–Khmer languages, comparable to, but apparently independently from the Chamiclanguages. 'The ocean is our universe' - Survival
Human History. 2016. David Thomas (1989). A 19th century perception of Chamic relationships. Mahidol University and Summer Institute of Linguistics. Link