@article{Fulber-Garcia-2016-Compressao,
  title={Compress\{a}o de Arquivos Orientados a Colunas com PPM},
  author={Fulber-Garcia, Vinicius and Mergen, S\'{e}rgio L S}
  booktitle={Escola Regional de Banco de Dados},
  pages={40-49},
  year={2016},
  organization={SBC}
}