1. Factors in the transmission of virus infections from animals to man;Smith;Sci. Basis Med. Annu. Rev.,1964
2. The use of mathematical models in determining vaccination policies;Becker;Bull. Int. Stat. Inst.,1975
3. Transmission and control of arboviruses;Dietz,1975
4. Infectious Diseases of Humans: Dynamics and Control;Anderson,1991
5. Vaccination in age structured populations I: the reproduction number;Hadeler,1996