@article{Kulu2007,
author = {Kulu, H. and Vikat, A. and Andersson, G.},
title= {Settlement size and fertility in the Nordic countries},
year = {2007},
doi = {10.1080/00324720701571749},
journal = {Population Studies},
volume = {61},
number = {3},
pages = {265--285},
}