DJVU PDF Ruengdet Pankhuenkhat. 2004, "Tai ortholinguisics: a case study of '຦ຠຢ' and 'ຫຍ~ຍ' in Lao x~xx and 'x' in Lanna script", in Papers from the Eleventh Annual Meeting of the Southeast Asian Linguistics Society, ed. S. Burusphat, Tempe, Arizona, pp. 519-527. Arizona State University, Program for Southeast Asian Studies. cite.