J. Kittijaruwattana, P. Ngampradit, K. Srikaew, N. Meekaew, A. Chotikhun, and K. Chonsin, “Health risk assessment of oil palm farmers in Makham Tia Subdistrict, Mueang Surat Thani District, Surat Thani Province”, ubruphjou, vol. 15, no. 1, pp. 71–84, Apr. 2026.