1. Aranha, J.A.P., Fernandes, A.C., 1994. On the second order low frequency force spectrum. In: Proceedings of Applied Ocean Research. São Paulo, pp. 311–313 (July).
2. Random Vibration in Mechanical System;Crandall,1963
3. Dallinga, R.P., Huijsmans, R.H.M., Pinkster, J.A., 1988. Combined statistics of first and second order motions of semi-submersibles. In: Proceedings of BOSS Conference. Trondheim, pp. 733–754.
4. Faltinsen, O.M., Loken, A.E., 1978. Drift forces and slowly varying horizontal forces on a ship in waves. In: Symposium on Applied Mathematics Dedicated to the Late Prof. Dr. R. Timman, Delft, The Netherlands.
5. Lee, C.H., 1995. WAMIT Theory Manual. Report No. 95-2. Massachusetts Institute of Technology.