Preparation and stability of silicone dioxide dispersed in polyalkylene glycol based nanolubricantsM.Z. Sharif, W.H. Azmi, A.A.M. Redhwan and N.M.M. ZawawiMATEC Web Conf., 90 (2017) 01049DOI: https://doi.org/10.1051/matecconf/20179001049