@article{Clemen1989,
author = {Clemen, R.T.},
title= {Combining forecasts: A review and annotated bibliography},
year = {1989},
doi = {10.1016/0169-2070(89)90012-5},
journal = {International Journal of Forecasting},
volume = {5},
number = {4},
pages = {559--583},
}