A grammar of space in Japanese 論文集所収 Sotaro Kita ·2006-09-14 ·『Cambridge University Press eBooks』 pp. 437-474 doi:10.1017/cbo9780511486753.013
North Kyushu Creole: a language-contact model for the origins of Japanese 論文集所収 John C. Maher ·1996-09-13 ·『Cambridge University Press eBooks』 pp. 31-45 doi:10.1017/cbo9781139084901.003