@InProceedings{martins-EtAl:2011:EMNLP2,
  author    = {Martins, Andre  and  Smith, Noah  and  Figueiredo, Mario  and  Aguiar, Pedro},
  title     = {Structured Sparsity in Structured Prediction},
  booktitle = {Proceedings of the 2011 Conference on Empirical Methods in Natural Language Processing},
  month     = {July},
  year      = {2011},
  address   = {Edinburgh, Scotland, UK.},
  publisher = {Association for Computational Linguistics},
  pages     = {1500--1511},
  url       = {http://www.aclweb.org/anthology/D11-1139}
}