10. Zhen Zhao, .Caishan Liu*, The analysis and simulation for three-dimensional impact with friction, Multibody Syst Dyn 18: 511–530, 2007, (Research paper)
11. Liu, Caishan*, Ke Zhang, and Lei Yang. "The compliance contact model of cylindrical joints with clearances." Acta Mechanica Sinica 21.5 (2005): 451-458. (Research paper)
12. Zhao, Zhen, Caishan Liu*, and Bernard Brogliato. "Planar dynamics of a rigid body system with frictional impacts. II. Qualitative analysis and numerical simulations." Proceedings of the Royal Society of London A: Mathematical, Physical and Engineering Sciences. Vol. 465. No. 2107. The Royal Society, 2009.(Research paper)
13. Liang, Jianxun, Ou Ma, and Caishan Liu*. "Model reduction of contact dynamics simulation using a modified Lyapunov balancing method."Frontiers of Mechanical Engineering 6.4 (2011): 383-391.(Research paper)
14. Caishan Liu*, et al. "Impact–contact dynamics in a disc–ball system."Proceedings of the Royal Society of London A: Mathematical, Physical and Engineering Sciences. Vol. 469. No. 2152. The Royal Society, 2013.(Research paper)
15. Wang, Jiao, Caishan Liu*, Yanbin Jia, Daolin Ma. "Ratchet rotation of a 3D dimer on a vibrating plate." The European Physical Journal E 37.1 (2014): 1-13.(Research paper)
16. Zhang, Hongjian, Bernard Brogliato, and Caishan Liu*. "Dynamics of planar rocking-blocks with Coulomb friction and unilateral constraints: comparisons between experimental and numerical data." Multibody System Dynamics32.1 (2014): 1-25.(Research paper)
17. Wang, Jiao, Caishan Liu*, and Zhen Zhao. "Nonsmooth dynamics of a 3D rigid body on a vibrating plate." Multibody System Dynamics 32.2 (2014): 217-239.(Research paper)
18. Ma, Daolin, Caishan Liu*, Zhen Zhao, Hongjian Zhan. "Rolling friction and energy dissipation in a spinning disc."Proc. R. Soc. A. Vol. 470. No. 2169. The Royal Society, 2014.(Research paper)
19. Zhao, Zhen, Caishan Liu*, Chen, Bin, Bernard Brogliato. "Asymptotic analysis of Painlevé’s paradox." Multibody System Dynamics 35.3 (2015): 299-319.(Research paper)
20. Zhao, Zhen, and Caishan Liu*. "Contact constraints and dynamical equations in Lagrangian systems." Multibody System Dynamics (2015): 1-23.(Research paper)
21. Zhao, Zhen, Caishan Liu*, and Wei Ma. "Characteristics of steady vibration in a rotating hub–beam system." Journal of Sound and Vibration 363 (2016): 571-583.(Research paper)