1. American Petroleum Institute (1989). “API-RP2A Recommended Practice for Planning, Designing and Constructing Fixed Offshore Platforms”. 18th ed., Washington, D.C.
2. Buric, M.R. (1978). “Optimal Regulation of Nonlinear Systems by Methods of Tensor Algebra”. PhD dissertation, Department of Electrical Engineering, University of Minnesota.
3. Cheng, A.H.D., Hackl, K., Yang, C.Y. & Chajes, M.J. (1993). “Stability, Bifurcation and Chaos of Non-Linear Structures With Control-II”. Non-Autonomous Case. International Journal of Non-Linear Mechanics 28: 549–565.
4. Clough, R.W. and Penzien, J. (1989). “Dynamics of Structures”. McGraw-Hill Book Company, Singapore, 634 p.
5. Cui, F., Chew, C.H., Xu, J. & Cai, Y (1997). “Bifurcation and Chaos in the Duffing Oscillator with a Pid Controller”. Nonlinear Dynamics 12: 251–262.