R. Pitcher, H. Hillel and C. H. Curtis, “Hydraulic Suspensions with Particular Reference to Public Service Vehicles,” Proceeding of Public Service Vehicles Conference, Mechanical Engineering Publications, London, 1977.
 P. G. Wright and D. A. Williams, “The Application of Active Suspension to High Performance Road Vehicles,” Proceedings of IMecE Conference on Microprocessors in Fluid Power Engineering, Mechanical Engineering Pub- lications, London, 1984, pp. 23-28.
 D. A. Crolla and A. M. A. Aboul Nour, “Theoretical Comparisons of Various Active Suspension Systems in Terms of Performance and Power Requirements,” Proceedings of IMecE Conference on Advanced Suspensions, Vol. 1-9, 24-25 October 1988.
 R. S. Sharp and S. A. Hassan, “On the Performance Capabilities of Active Automobile Suspension Systems of Li- mited Bandwidth,” Vehicle System Dynamics, Vol. 16, No. 4, 1987, pp. 213-225. doi:10.1080/00423118708968879
 T. J. Gordon, C. Marsh and M. G. Milsted, “A Comparison of Adaptive LQG and Non-Linear Controllers for Vehicle Suspension Systems,” Vehicle System Dynamics: International Journal of Vehicle, Vol. 20, No. 6, 1991, pp. 321-340. doi:10.1080/00423119108968993
 C. Scherer, P. Gahinet and M. Chilali, “Multi Objective Output Feedback Control via LMI Optimization,” IEEE Transactions on Automatic Control, Vol. 42, No. 7, 1997, pp. 896-911. doi:10.1109/9.599969
 V. T. Zanchin and A. S. Bazanella, ‘‘Robust Output Feedback Design with Application to Power Systems,” Proceeding of 42nd IEEE Conference on Decision and Control, Vol. 4, Maui, December 2003, pp. 3870-3875.
 A. Bensenouci and A. M. AbdelGhany, “Mixed H?/H2 with Pole-Placement Design of Robust LMI-Based Out- put Feedback Controllers for Multi-Area Load Frequency Con-trol,” The IEEE International Conference on Computer as a Tool, Warsaw, September 9-12 2007.
 Y. Nesterov and A. Nemirovskii, “Interior Point Polynomial Algorithms in Con-vex Programming: Theory and Applications,” SIAM Studies Studies in Applied Mathematics, Vol. 13, Philadelphia, 1994. doi:10.1137/1.9781611970791
 A. Nemirovskii and P. Gahinet, “The Projective Method for Solving Linear Matrix Inequalities,” Mathematical Programming Series B, Vol. 77, No. 2, 1997, pp. 163-190. doi:10.1016/S0025-5610(96)00085-8