1. Que se hace en España con los Aceites Usados?;Martín;Ing. Quim.,1995
2. D. Brownawell, R. Renard, Re-refining of Used Oil, US Patent 3,639,229 (1972).
3. Regeneration of used lubricant oil by polar solvent extraction;Rincón;Ind. Eng. Chem. Res.,2005
4. Waste oil recycling using mixtures of polar solvents;Rincón;Ind. Eng. Chem. Res.,2005
5. M.L. Whisman, J.W. Reynolds, J.W. Goetzinger, F.O. Cotton, D.W. Brinkman, Method for reclaiming waste lubricating oil, US Patent 4,073,720 (1978).