@techreport{Beltrán-Sánchez2007,
author = {Beltrán-Sánchez, H. and Preston, S.H.},
title= {A new method for attributing changes in life expectancy to various causes of death, with application to the United States},
year = {2007},
URL = {http://repository.upenn.edu/cgi/viewcontent.cgi?article=1004&context=psc\_working\_papers},
number = {PSC Working Paper Series PSC 07-01},
}