@article{Frejka2001,
author = {Frejka, T. and Calot, G.},
title= {Cohort reproductive patterns in low-fertility countries},
year = {2001},
doi = {10.1111/j.1728-4457.2001.00103.x},
journal = {Population and Development Review},
volume = {27},
number = {1},
pages = {103--132},
}