@article{Shang2016,
author = {Shang, H. and Smith, P.W.F. and Bijak, J. and Wiśniowski, A.},
title= {A multilevel functional data method for forecasting population: With an application to the United Kingdom},
year = {2016},
doi = {10.1016/j.ijforecast.2015.10.002},
volume = {32},
number = {3},
pages = {629--649},
}