@article{Keiding1991,
author = {Keiding, N.},
title= {Age-Specific Incidence and Prevalence: A Statistical Perspective},
year = {1991},
doi = {10.2307/2983150},
journal = {Journal of the Royal Statistical Society. Series A (Statistics in Society)},
volume = {154},
number = {3},
pages = {371--412},
}