@article{Billari2012,
author = {Billari, F.C. and Graziani, R. and Melilli, E.},
title= {Stochastic population forecasts based on conditional expert opinions},
year = {2012},
doi = {10.1111/j.1467-985X.2011.01015.x},
volume = {175},
number = {2},
pages = {491--511},
}