8Thacker et al.The Surveillance of Infectious Diseases.JAMA.1983,249(9):1181-1185.
9Grenfell BT,Anderson RM.The estimation of age-related rates of infection from case notifications and serological data.Journal of Hygiene.1985,95:419-436.
10Ciro A.de Quadros,et al.Measles Elimination in the Americas.JAMA.1996 Jan,276(3):224-229.