@article{Valkonen1997,
author = {Valkonen, T. and Van Poppel, F.},
title= {The contribution of smoking to sex differences in life expectancy: Four Nordic countries and The Netherlands 1970-1989},
year = {1997},
doi = {10.1093/eurpub/7.3.302},
journal = {European Journal of Public Health},
volume = {7},
number = {3},
pages = {302--310},
}