1. Alibegov, M.M.: Phys. Rev. E 59, 4841 (1999)
2. Aronson, B.D., Johnson, K.A., Loros, J.J., Dunlap, J.C.: Science 263, 1578 (1994)
3. Benzi, R., Sutera, A., Vulpiani, A.: J. Phys. A 14, L453 (1981)
4. Brugioni, S., Hwang, D.U., Meucci, R., Boccaletti, S.: Phys. Rev. E 71, 062101 (2005)
5. Cloudsley-Thompson, J.L.: Biological Clocks—Their Function in Nature. Weidenfeld and Nicolson, London (1980)