1. H. Haken, Synergetics (Springer, Berlin, 1977)
2. G. Ausiello, P. Crescenzi, G. Gambosi, et al., Complexity and Approximation – Combinatorial optimization problems and their approximability properties (Springer, Berlin, 1999)
3. S.H. Strogatz, Nonlinear Dynamics and Chaos: With Applications to Physics, Biology, Chemistry and Engineering (Perseus, New York, 2001)
4. Y. Kuramoto, Chemical Oscillations, Waves, and Turbulence (Springer, Berlin, 1984)
5. A. Pikovsky, M. Rosenblum, J. Kurths, Synchronization: A Universal Concept in Nonlinear Sciences (Cambridge University Press, Cambridge, 2003)