1. A contribution to the mathematical theory of epidemics;Kermack;Proc R Soc Ser A,1927
2. An introduction to mathematical epidemiology;Martcheva,2015
3. Mathematical theory of age-structured population dynamics;Iannelli;Giardini Editori E Stampatori in Pisa,1995
4. Theory of nonlinear age-dependent population dynamics;Webb,1985
5. Epidemiological models with age structure, proportionate mixing, and cross-immunity;Castillo-Chavez;J Math Biol,1989