@article{Keilman2002,
author = {Keilman, N. and Pham, D.Q. and Hetland, A.},
title= {Why population forecasts should be probabilistic ‒ illustrated by the case of Norway},
year = {2002},
doi = {10.4054/DemRes.2002.6.15},
journal = {Demographic Research},
volume = {6},
number = {15},
pages = {409--454s},
}