@article{Coale1986,
author = {Coale, A.J. and Kisker, E.E.},
title= {Mortality crossovers: Reality or bad data?},
year = {1986},
doi = {10.1080/0032472031000142316},
journal = {Population Studies},
volume = {40},
number = {3},
pages = {389--401},
}