@inbook{Armstrong2001,
author = {Armstrong, J.S.},
title= {Combining forecasts},
year = {2001},
doi = {10.1007/978-0-306-47630-3_19},
editor = {Armstrong, J.S.},
booktitle = {Principles of forecasting: A handbook for researchers and practitioners},
address = {Boston, MA},
publisher = {Springer},
pages = {417--439},
}