Kâte at Ethnologue (18th ed., 2015) (subscription required)
handle.net
hdl.handle.net
Pawley, Andrew (2012). Hammarström, Harald; van den Heuvel, Wilco (eds.). "How reconstructable is proto Trans New Guinea? Problems, progress, prospects". History, Contact and Classification of Papuan Languages (Language & Linguistics in Melanesia Special Issue 2012: Part I). Port Moresby, Papua New Guinea: Linguistic Society of Papua New Guinea: 88–164. hdl:1885/38602. ISSN0023-1959.
semanticscholar.org
api.semanticscholar.org
Hitch, Doug (2017). "Vowel spaces and systems". Toronto Working Papers in Linguistics (TWPL). 38: 34. S2CID125442142.
worldcat.org
search.worldcat.org
Pawley, Andrew (2012). Hammarström, Harald; van den Heuvel, Wilco (eds.). "How reconstructable is proto Trans New Guinea? Problems, progress, prospects". History, Contact and Classification of Papuan Languages (Language & Linguistics in Melanesia Special Issue 2012: Part I). Port Moresby, Papua New Guinea: Linguistic Society of Papua New Guinea: 88–164. hdl:1885/38602. ISSN0023-1959.