@article{Upchurch2002,
author = {Upchurch, D.M. and Lillard, L.A. and Panis, C.W.A.},
title= {Nonmarital childbearing: Influences of education, marriage, and fertility},
year = {2002},
doi = {10.1353/dem.2002.0020},
journal = {Demography},
volume = {39},
number = {2},
pages = {311--329},
}