@inproceedings{TUC-HCIS/LP11a,
author = "N. T. Le and N. Pinkwart",
title = "Enhancing The Error Diagnosis Capability For Constraint-based Tutoring Systems",
year = 2011,
booktitle = "Proceedings of the 15th International Conference on Artificial Intelligence in Education (AIED)",
publisher = "Springer Verlag",
number = 6738,
keywords = "incom"
}