@article{optimalcombinationforecastsonretailmulti,
  title = {Optimal Combination Forecasts on Retail Multi-Dimensional Sales Data},
  author = {Luis Roque and Cristina A. C. Fernandes and Tony Silva},
  year = {2019},
  eprint = {1903.09478},
  archivePrefix = {arXiv},
  url = {http://arxiv.org/abs/1903.09478v1},
}