@article{Udry1996,
author = {Udry, J.R.},
title= {Biosocial models of low-fertility societies},
year = {1996},
doi = {10.2307/2808017},
journal = {Population and Development Review. Supplement: Fertility in the United States: New Patterns, New Theories},
volume = {22},
pages = {325--336},
}