Coupe, Alexander, Prestopped bilabial trills in Sangtam, Proceedings of the 18th International Congress of Phonetic Sciences, Glasgow, 10-14 August 2015, 2016 [2020-12-27], (原始内容存档于2020-03-27).
Coupe, Alexander, Prestopped bilabial trills in Sangtam, Proceedings of the 18th International Congress of Phonetic Sciences, Glasgow, 10-14 August 2015, 2016 [2020-12-27], (原始内容存档于2020-03-27).