Somnuk, C., B. Innawong, and C. Tirawattanawanich. “Cytotoxicity of Used Frying Oil Recovered by Different Adsorbents”. Agriculture and Natural Resources, vol. 47, no. 6, Dec. 2013, pp. 874-8, https://li01.tci-thaijo.org/index.php/anres/article/view/243157.