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Miyake, Marc Hideo. (2008). Old Japanese: a Phonetic Reconstruction. London: RoutldegeCurzon. 10-ISBN 0415305756/13-ISBN 9780415305754; OCLC 51163755

Shimabukuro, Moriyo. (2007). The Accentual History of the Japanese and Ryukyuan Languages: a Reconstruction. London: Global Oriental. 10-ISBN 190190363X/13-ISBN 9781901903638; OCLC 149189163