DJVU PDF O'connor, R.A. 1991, "Sukhothai rule, religion and elite rivalry", in The Ram Khamhaeng Controversy, ed. J.R. Chamberlain, pp. 273-308. The Siam Society. cite.

DJVU PDF Woodward, H.W.Jr. 1991, "Ram Khamhaeng's inscription: the search for context", in The Ram Khamhaeng Controversy, ed. J.R. Chamberlain, pp. 419-438. The Siam Society. cite.

DJVU PDF Wyatt, D.K. 1991, "Contextual arguments for the authenticity of the Ram Khamhaeng inscription", in The Ram Khamhaeng Controversy, ed. J.R. Chamberlain, pp. 439-452. The Siam Society. cite.

DJVU PDF Doré, A. 1991, "The Sukhothai inscription seen from the middle Mekhong valley", in The Ram Khamhaeng Controversy, ed. J.R. Chamberlain, pp. 513-522. The Siam Society. cite.