1. Eco-friendly multifunction petroleum additives preparation, characterization and evaluation;Abo-Hatab;Tribol Ind,2018
2. A comparative study of recycling of used engine oil using extraction by composite solvent, single solvent, and acid treatment methods;Abro;Int Schol Res Not,2013
3. Lubricating Oil Additives. In Tribology - Lubricants and Lubrication;Ahmed,2011
4. Modern recovery methods in used oil re-refining;Bridjanian;Petroleum Coal,2006
5. Re-refining of waste lubricating oil by solvent extraction;Durrani;Mehran Univ Res J Eng Technol,2011