Jahromi, A. , Xie, W. , Bhat, R. (2012), 'Ride Control of Passenger Cars with Semi-active Suspension System Using a Linear Quadratic Regulator and Hybrid Optimization Algorithm', World Academy of Science, Engineering and Technology, Open Science Index 67, International Journal of Mechanical and Mechatronics Engineering, 6(7), 1280 - 1286.