Vannasri, K., S. Maenpuen, and P. Tunit. “Effect of Emulgel containing Langkasuka Oil versus Diclofenac Gel for Improving Physical Function in Patients with Knee Osteoarthritis: A randomized controlled trial”. Interdisciplinary Research Review, vol. 21, no. 2, Apr. 2026, https://ph02.tci-thaijo.org/index.php/jtir/article/view/265218.