7Yang L H, Zhu Y, Chen F G, et al. Test on Evaluation Method for Biodegradability of Lubricants[J]. Transactions of Tianjin University, 2008, 14: 61-65.
8Loredana P. Basestock Oils for Lubricants from Mixtures of Corn Oil and Synthetic Diesters.J Am Oil Chem Soc[J]. 2008, 85: 71-76.
9Frederique H, Jean G. Guy A J. Viscosity properties of mineral paraffinic base oils as a key factor in their primary biodegradability[J]. Biodegradation, 2000, 11: 365-369.
