@article{Beer2010,
author = {Beer, J. and Raymer, J. and Erf, R. and Wissen, L.},
title= {Overcoming the problems of inconsistent international migration data: A new method applied to flows in Europe},
year = {2010},
doi = {10.1007/s10680-010-9220-z},
volume = {26},
number = {4},
pages = {459--481},
}