4Urata K, Takaishi N. Application of phase-transfer catalytic re- actions to fatty acids andtheir derivatives:present state and future potential[J]. Journal of the American Oil Chemists Society, 1996, 73(7):831-839.
5Ferreira L, Ramos M A.Exquisite regioselectivity and increased transesterification activity of an immobilized bacillus subtilis pro- tease[J]. Biotechnology Progress, 2002, 18(5):986-993.
