@article{Petersen2011,
author = {Petersen, I. and Martinussen, T. and McGue, M. and Bingley, P. and Christensen, K.},
title= {Lower marriage and divorce rates among twins than among singletons in Danish birth cohorts 1940–1964},
year = {2011},
doi = {10.1375/twin.14.2.150},
volume = {14},
number = {2},
pages = {150--157},
}