1. Arnold, L., 1974. Stochastic Differential Equations: Theory and Applications. Wiley-Interscience (John Wiley & Sons), New York, London, Sydney.
2. Sustained oscillations in stochastic systems;Aparicio;Math. Biosc.,2001
3. The Mathematical Theory of Infectious Diseases and its Applications;Bailey,1975
4. Bartlett, M.S., 1956. Deterministic and stochastic models for recurrent epidemics. In: Proceedings of the Third Berkeley Symposium on Mathematical Statistics and Probability, 1954–1955, vol. IV, University of California Press, Berkeley and Los Angeles, pp. 81–109.
5. Brauer, F., Castillo-Chávez, C., 2001. Mathematical models in population biology and epidemiology. Texts in Applied Mathematics, vol. 40. Springer, New York.