@inbook{Öberg1996,
author = {Öberg, S.},
title= {Spatial and economic factors in future South-North migration},
year = {1996},
editor = {Lutz, W.},
booktitle = {The Future Population of the World: What Can We Assume Today? Revised edition},
address = {London},
publisher = {Earthscan},
pages = {336--357},
}