@article{Sanchez1998,
author = {Sanchez, L. and Manning, W. and Smock, P.},
title= {Sex-specialized or collaborative mate selection? Union transitions among cohabitors},
year = {1998},
doi = {10.1006/ssre.1998.0627},
journal = {Social Science Research},
volume = {27},
pages = {280--304},
}