1. MacDonald, N.: Biological Delay Systems: Linear Stability Theory. Cambridge University Press, Cambridge, MA (1989)
2. Kuang, Y.: Delay Differential Equations with Applications in Population Dynamics. Academic, Boston (1993)
3. Balachandran, B.: Nonlinear dynamics of milling processes. Phil. Trans. R. Soc. Lond. A 359, 793–819 (2001)
4. Nayfeh, A.H., Chin, C., Pratt, J.: Perturbation methods in nonlinear dynamics – applications to machining dynamics. J. Manuf. Sci. Eng. 119, 485–493 (1997)
5. Stone, E., Askari, A.: Nonlinear models of chatter in drilling processes. Dyn. Syst. 17, 65–85 (2002)