[4] C. Huygens. Oeuvres Complètes, 7(1897).
[5] H. M. Oliveira, L. V. Melo. Huygens synchronization of two clocks. Sci. Rep., 5, 11548(2015).
[6] J. Kurths, A. Pikovsky, M. Rosenblum. Synchronization: A Universal Concept in Nonlinear Sciences(2001).
[7] S. Bregni. Synchronization of Digital Telecommunications Networks, 27(2002).
[11] H. Nijmeijer, A. Rodriguez-Angeles. Synchronization of Mechanical Systems, 46(2003).
[17] V. Peano et al. Topological phases of sound and light. Phys. Rev. X, 5, 031011(2015).
[29] M. Zhang et al. Electronically programmable photonic molecule. Nat. Photonics, 13, 36-40(2019).
[39] D. F. Walls, G. J. Milburn. Quantum Optics(2007).
[43] H. Carmichael. Statistical Methods in Quantum Optics 1: Master Equations and Fokker-Planck Equations(1999).
[46] J. E. Marsden, M. McCracken. The Hopf Bifurcation and Its Applications, 19(2012).
[48] K. H. J. Buschow, F. R. Boer. Physics of Magnetism and Magnetic Materials, 92(2003).
[49] M. A. Armstrong. Basic Topology(2013).