@article{Lappegård2013,
author = {Lappegård, T. and Rønsen, M.},
title= {Socioeconomic Differences in Multipartner Fertility Among Norwegian Men},
year = {2013},
doi = {10.1007/s13524-012-0165-1},
journal = {Demography},
volume = {50},
number = {3},
pages = {1135--1153},
}