“Wanne Uchinanchu – I am Okinawan.” Japan, the US and Okinawa's Endangered Languages 論文 Patrick Heinrich・Fija Bairon ·2007-11-01 ·『Japan focus』 5(11) doi:10.1017/s1557466007022462
The Ryukyus and the New, But Endangered, Languages of Japan 論文 Patrick Heinrich・Fija Bairon・Matthias Brenzinger ·2009-05-01 ·『Japan focus』 7(19) doi:10.1017/s1557466009023870