Morris, A., Kua, Y. L., Gan, S., & Ng, H. K. (2018). Optimization of simultaneous carotenes and vitamin E (tocols) extraction from crude palm olein using response surface methodology. Chemical Engineering Communications, 205(5), pp. 596-609. doi:10.1080/00986445.2017.1407760

Morris, Andrew, Yin Leng Kua, Suyin Gan, and Hoon Kiat Ng. "Optimization of Simultaneous Carotenes and Vitamin E (tocols) Extraction From Crude Palm Olein Using Response Surface Methodology." Chemical Engineering Communications 205, no. 5 (2018): 596-609.

Morris, Andrew, Yin Leng Kua, Suyin Gan, and Hoon Kiat Ng. "Optimization of Simultaneous Carotenes and Vitamin E (tocols) Extraction From Crude Palm Olein Using Response Surface Methodology." Chemical Engineering Communications 205.5 (2018): 596-609.