Vickery, Michael. The Ram Khamhaeng Inscription: A Piltdown Skull of Southeast Asian History?. Chamberlain, James R. (编). The Ram Khamhaeng controversy : collected papers(PDF). 1991: 3–51 [2022-04-30]. (原始内容(PDF)存档于2022-04-02).
Vickery, Michael. The Ram Khamhaeng Inscription: A Piltdown Skull of Southeast Asian History?. Chamberlain, James R. (编). The Ram Khamhaeng controversy : collected papers(PDF). 1991: 3–51 [2022-04-30]. (原始内容(PDF)存档于2022-04-02).