@article{Bras2009,
author = {Bras, H. and Van Poppel, F. and Mandemakers, K.},
title= {Relatives as spouses: Preferences and opportunities for kin marriage in a western society},
year = {2009},
doi = {10.1002/ajhb.20896},
volume = {21},
number = {6},
pages = {793--804},
}