P. . . Thongpool, S. . . Peanprasit, P. . . Wirotecheewan, N. . . Chindaprasert, K. . Lertlaokul, and P. . Tinprabath, “STUDY ON DRYING OF KRATOM LEAVES USING FLUIDIZED BED METHOD”, PSRU J. Sci. Tech., vol. 10, no. 3, pp. 122–139, Dec. 2025.