@article{Caldwell1992,
author = {Caldwell, J.C. and Orubuloye, I.O. and Caldwell, P.},
title= {Fertility decline in Africa: A new type of transition},
year = {1992},
doi = {10.2307/1973678},
journal = {Population and Development Review},
volume = {18},
number = {2},
pages = {211‒242},
}