@article{Willets2004,
author = {Willets, R.C.},
title= {The cohort effect: Insights and explanations},
year = {2004},
doi = {10.1017/S1357321700002762},
URL = {https://doi.org/doi:10.1017/S1357321700002762},
volume = {10},
number = {4},
pages = {833--898},
}