Asavametha N, Suwannalai T, Puvanbanditsin P, and Shoosanglertwijit J. “Effect of topical vitamin E on radiation induced skin alteration in head and neck cancer patients Supported by The Ratchadapiseksompotch Fund Year 2003, Chulalongkorn University”. Journal of Thai Association of Radiation Oncology, vol. 10, no. 1-3, Aug. 2025, pp. 48-58, https://he01.tci-thaijo.org/index.php/jtaro/article/view/281455.