Japanese Dialects and Ryukyuan 論文集所収 Shinji Sanada・Yukio Uemura ·2007-04-12 ·pp. 355-368 doi:10.1093/oso/9780199266623.003.0018
On the grammaticalization of ideophones 論文集所収 Alexander Andrason・Bernd Heine ·2023-06-15 ·『Studies in language companion series』 pp. 237-262 doi:10.1075/slcs.232.09and