@article{Settersen1997,
author = {Settersen, R.A. and Mayer, K.U.},
title= {The measurement of age, age structuring, and the life course},
year = {1997},
doi = {10.1146/annurev.soc.23.1.233},
journal = {Annual Review of Sociology},
volume = {23},
pages = {233--261},
}