@article{Deeg2013,
author = {Deeg, D. and Vliet, J.G. and Kardaun, J. and Huisman, M.},
title= {Understanding the mortality decline at older ages: Improved life course or improved present period?},
year = {2013},
doi = {10.1891/0198-8794.33.261},
volume = {33},
number = {1},
pages = {259--291},
}