@article{Graefe1999,
author = {Graefe, D.R. and Lichter, D.T.},
title= {Life course transitions of American children: Parental cohabitation, marriage, and single motherhood},
year = {1999},
doi = {10.2307/2648109},
journal = {Demography},
volume = {36},
number = {2},
pages = {205--217},
}