DJVU PDF Theraphan L-Thongkum and Chommanad Intajamornrak. 2008, "Tonal evolution induced by language contact: A case study of the T'in (Lua') language of Nan province, northern Thailand", in The Mon-Khmer Studies Journal, vol. 38, pp. 57-68. cite.

DJVU PDF Theraphan L-Thongkum. 2002, "The Role of Endangered Mon-Khmer Languages of Xekong Province, Southern Laos, in the Reconstruction of Proto-Katuic", in Papers from the Tenth Annual Meeting of the Southeast Asian Linguistics Society, ed. M. Macken, pp. 407-430. Arizona State University, Program for Southeast Asian Studies. cite.

DJVU PDF Theraphan L-Thongkum. 2001, "The Tai-Kadai peoples of Hainan Island and their languages", in Essays in Tai Linguistics, ed. M.R. Kalaya Tingsabadh and A.S. Abramson, pp. 189-204. Chulalongkorn University Press. cite.

DJVU PDF Theraphan L-Thongkum. 2000, "Proto-Katuic Body Parts", in The 33rd International Conference on Sino-Tibentan Languages and Linguistics, Bangkok, Thailand, pp. 311-322. Ramkhamhaeng University. cite.

DJVU PDF Pranee Kullavanijaya and Theraphan L-Thongkum. 1998, "Linguistic criteria for determining Tai ethnic groups: Case studies on central and south-western Tais", in The International Conference on Tai Studies, ed. S. Burusphat, Bangkok, Thailand, pp. 273-298. Institute of Language and Culture for Rural Development, Mahidol University. cite.

DJVU PDF Thongkum, T.L. 1997, "Tone Change and Language Contact: a Case Study of Mien-Yao and Thai", in Southeast Asian Linguistics Studies In Honor of Vichin Panupong, ed. A.S. Abramson, pp. 153-160. Chulalongkorn University Press. cite.

DJVU PDF Theraphan L. Thongkum. 1997, "The place of Lawi Harak and Tariang within Bahnaric", in The Mon-Khmer Studies Journal, vol. 27, pp. 109-117. cite.

DJVU PDF Theraphan L. Thongkum. 1993, "A View on Proto-Mjuenic (Yao)", in The Mon-Khmer Studies Journal, vol. 22, pp. 163-230. cite.

DJVU PDF Theraphan L. Thongkum. 1992, "A preliminary reconstruction of Proto-Lakkja (Cha Shan Yao)", in The Mon-Khmer Studies Journal, vol. 20, pp. 57-90. cite.

DJVU PDF Thongkum, T.L. 1992, "The raising and lowering of pitch caused by a voicing distinction in sonorants (nasals and approximants): an epidemic disease in SEA languages", in The Third International Symposium on Language and Linguistics, Bangkok, Thailand, pp. 1079-1088. Chulalongkorn University. cite.

DJVU PDF Theraphan, L-T. 1991, "An instrumental study of Chong registers", in Austroasiatic Languages, Essays in honour of H. L. Shorto, ed. J.H.C.S. Davidson, pp. 141-160. School of Oriental and African Studies, University of London. cite.

DJVU PDF Theraphan L-Thongkum. 1988, "Another look at the register distinction in Mon", in The International Symposium on Language and Linguistics, ed. C. Bamroongraks et al., Bangkok, Thailand, pp. 22-51. Thammasat University. cite.

DJVU PDF Theraphan L. Thongkum. 1987-1988, "The interaction between pitch and phonation type in Mon: phonetic implications for a theory of tonogenesis", in The Mon-Khmer Studies Journal, vol. 16-17, pp. 11-24. cite.

DJVU PDF Theraphan L. Thongkum. 1986, "An acoustic study of the register complex in Kui (Suai)", in The Mon-Khmer Studies Journal, vol. 15, pp. 1-20. cite.

DJVU PDF Theraphan L-Thongkum. 1984, "Rhythmic groups and stress groups in Thai", in International Conference on Thai Studies, pp. 115-124. Chulalongkorn University. cite.

DJVU PDF Thongkum, T.L. 1979, "Iconicity of vowel qualities in Northeastern Thai reduplicated words", in Studies in Tai and Mon-Khmer Phonetics and Phonology In Honour of Eugénie J.A. Henderson, ed. T.L. Thongkum et al., pp. 247-260. Chulalongkorn University Press. cite.

DJVU PDF Theraphan L. Thongkum. 1979, "The distribution of the sounds of Bruu", in The Mon-Khmer Studies Journal, vol. 8, pp. 221-293. cite.