W. Roschat, S. Phewphong, P. Moonsin, P. Pholsupho, and S. Yapan, “PHYSICOCHEMICAL PROPERTIES OF BIODIESLE PRODUCT DERIVED FROM LARD OIL USING EGGSHELLS AS A GREEN CATALYST”, Suranaree J Sci Technol, vol. 27, no. 3, pp. 030025(1–8), Aug. 2026.