@article{Heesterbeek2002,
author = {Heesterbeek, J.A.P.},
title= {A brief history of r0 and a recipe for its calculation},
year = {2002},
doi = {10.1023/A:1016599411804},
journal = {Acta Biotheoretica},
volume = {50},
number = {3},
pages = {189--204},
}