1. Synchronization. A Universal Concept in Nonlinear Sciences;Pikovsky,2001
2. Oeuvres Completes de Christiaan Huygens, Vol. 17;Huygens,1660
3. Les horloges sympathiques de Huygens;Korteweg,1906
4. An account of the influence which two pendulum clocks were observed to have upon each other;Ellicott;Phil. Trans.,1739
5. Further observations and experiments concerning the two clocks above mentioned;Ellicott;Phil. Trans.,1753