@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 }