@article{Spoorenberg2012,
author = {Spoorenberg, T. and Schwekendiek, D.},
title= {Demographic changes in North Korea: 1993–2008},
year = {2012},
doi = {10.1111/j.1728-4457.2012.00475.x},
volume = {38},
number = {1},
pages = {133--158},
}