@article{Sumner2008,
author = {Sumner, S.A. and Layde, P.M. and Guse, C.E.},
title= {Firearm death rates and association with level of firearm purchase background check},
year = {2008},
doi = {10.1016/j.amepre.2008.03.023},
volume = {35},
number = {1},
pages = {1--6},
}