Royrod, P., N. Ketsak, and N. Lahpun. “Formulation of Microneedle Patches Containing Sappan Wood (Caesalpinia sappan L.) Extract”. The Golden Teak : Science and Technology Journal (GTSJ.), vol. 13, no. 1, Aug. 2026, pp. 109-20, https://li02.tci-thaijo.org/index.php/gts/article/view/1907.