1. Mem. STLE
2. Group Research, PETRONAS, Lots 3288 and 3289, Off Jalan Ayer Itam, Kawasan Institusi Bangi, Kajang, Selangor 43000, Malaysia
3. Tribology Group, Department of Mechanical Engineering, Imperial College London, Exhibition Road, London SW7 2AZ, United Kingdom
4. SKF Research and Development Centre, B.V., Kelvinbaan 16, Nieuwegein 3430 DT, The Netherlands