@InProceedings{lindberg-EtAl:2013:ENLG,
  author    = {Lindberg, David  and  Popowich, Fred  and  Nesbit, John  and  Winne, Phil},
  title     = {Generating Natural Language Questions to Support Learning On-Line},
  booktitle = {Proceedings of the 14th European Workshop on Natural Language Generation},
  month     = {August},
  year      = {2013},
  address   = {Sofia, Bulgaria},
  publisher = {Association for Computational Linguistics},
  pages     = {105--114},
  url       = {http://www.aclweb.org/anthology/W13-2114}
}