@InProceedings{penas-rodrigo:2011:ACL-HLT2011,
  author    = {Pe\~{n}as, Anselmo  and  Rodrigo, Alvaro},
  title     = {A Simple Measure to Assess Non-response},
  booktitle = {Proceedings of the 49th Annual Meeting of the Association for Computational Linguistics: Human Language Technologies},
  month     = {June},
  year      = {2011},
  address   = {Portland, Oregon, USA},
  publisher = {Association for Computational Linguistics},
  pages     = {1415--1424},
  url       = {http://www.aclweb.org/anthology/P11-1142}
}