@inproceedings{TUC-CSCW/PLAA09,
  author = "N. Pinkwart and C. Lynch and K. D. Ashley and V. Aleven",
  title = "Assessing Argument Diagrams in an Ill-defined Domain",
  year = 2009,
  booktitle = "Proceedings of the 14th International Conference on Artificial Intelligence in Education (AIED)",
  publisher = "IOS Press",
  number = 200
}