Epidemiological models with age structure, proportionate mixing, and cross-immunity
Carlos Castillo‐Chávez
,
H. W. Hethcote
,
Viggo Andreasen
,
Carlos Castillo‐Chávez
,
H. W. Hethcote
,
Viggo Andreasen
,
Simon A. Levin
,
W. M. Liu
1989
Journal of Mathematical Biology
337 citations