@article{Valkonen2004,
author = {Valkonen, T. and Martikainen, P. and Blomgren, J.},
title= {Increasing excess mortality among non-married elderly people in developed countries},
year = {2004},
doi = {10.4054/DemRes.2004.S2.12.},
journal = {Demographic Research},
volume = {S2},
number = {12},
pages = {305‒330},
}