TY  - RPRT
TI  - An age-structured model for pertussis transmission.
AU  - H W Hethcote
PY  - 1997
DO  - 10.1016/s0025-5564(97)00014-x
UR  - https://pubmed.ncbi.nlm.nih.gov/9309930/
ID  - 9309930
ER  -