1. 1. Galilee, U.S., Modesto, T.C., Soma, C. Biocatalytic synthesis of diethanolamide surfactants under mild reaction condition. Philipp. J. Sci., 2009; 138: 49?54.
2. 2. Al-Mulla, E.A.J., Wan Yunus, W.M.Z., Ibrahim, N.A., Rahman, M.Z.A. Enzymatic synthesis of fatty amides from palm olein. J. Oleo Sci., 2010; 59: 59-64.
3. 3. Hoidy, W.H., Ahmad, M.B., Al-Mulla, E.A.J., Wan Yunus, W.M.Z., Ibrahim, A.A. Chemical synthesis and characterization of N-hydroxy-N-methyl fattyamide from palm oil. Orient. J. Chem., 2010; 26: 369-72.
4. 4. Masyithah, Z., Herawan, T., Sembiring, S.B., Alfian, Z. The optimization of enzymatic synthesis for lauoryl-N-methyl glucamide surfactants. Indones. J. Chem., 2011; 11: 223?28.
5. 5. Tufvesson, P., Tornvall, U., Carvalho, J., Karlsson, A.J., Hatti-Kaul, R. Toward a cost-effective immobilized lipase for the synthesis of speciality chemicals. J. Mol. Catal. B Enzym., 2011; 68: 200-5.