1. Huygens (Hugenii), C. 1986. Horologium Oscillatorium. Apud F. Muguet, Parisiis, France, 1673. English Translation, The pendulum Clock, Iowa State University, Ames, 1986.
2. Dynamics and control of hybrid mechanical systems;Leonov,2010
3. Lyapunov quantities and limit cycles of two-dimensional dynamical systems;Kuzntsov,2010
4. Kuznetsov NV, Leonov GA, Nijmeijer H, Pogromsky A. (2007), Synchronization of two metronomes. In: Proceedings of third IFAC workshop on eriodic; 2007. p. 1–4.
5. Synchronization: a universal concept in nonlinear science;Pikovsky,2001