Poolkaew, E., Tengku Sulaiman, R. S. and Sriwisut, P. (2021) “PROBLEMS OF AMATEUR MUAYTHAI TRAINING OF INSTITUTE OF PHYSICAL EDUCATION”, Academic Journal of Thailand National Sports University. Chonburi, Thailand, 13(2), pp. 238–248. available at: https://he02.tci-thaijo.org/index.php/TNSUJournal/article/view/250727 (accessed: 18 September 2026).