@article{Kippen2012,
author = {Kippen, Rebecca and Walters, Sarah},
title= {Is Sibling Rivalry Fatal? Siblings and Mortality Clustering},
year = {2012},
doi = {10.1162/JINH_a_00305},
journal = {Journal of Interdisciplinary History},
volume = {42},
number = {4},
pages = {571--591},
}