@INPROCEEDINGS{BILL04,
  author = {William Billingsley and Peter Robinson and Mark Ashdown and Chris
	Hanson},
  title = {Intelligent Tutoring and Supervised Problem Solving in the Browser},
  booktitle = {Proceedings of the IADIS International Conference WWW/Internet 2004},
  year = {2004},
  pages = {806--811}
}