Sukirno, S., Cleo, and Devan. “Sulphurization of Kapok (Ceiba Pentandra ) Seed Oil via H2S Bubbling Under UV Radiation and The Product’s Performance As Extreme Pressure Additives for Lubricant”. ASEAN Journal of Chemical Engineering, Vol. 24, no. 3, Dec. 2024, pp. 365-72, doi:10.22146/ajche.17735.