@InProceedings{marujo-EtAl:2015:*SEM2015,
  author    = {Marujo, Luis  and  Ribeiro, Ricardo  and  Martins de Matos, David  and  Neto, Jo\~{a}o  and  Gershman, Anatole  and  Carbonell, Jaime},
  title     = {Extending a Single-Document Summarizer to Multi-Document: a Hierarchical Approach},
  booktitle = {Proceedings of the Fourth Joint Conference on Lexical and Computational Semantics},
  month     = {June},
  year      = {2015},
  address   = {Denver, Colorado},
  publisher = {Association for Computational Linguistics},
  pages     = {176--181},
  url       = {http://www.aclweb.org/anthology/S15-1020}
}