@inproceedings{EDM-2010-BoyerPHWVL,
	author        = "Kristy Elizabeth Boyer and Robert Phillips and Eunyoung Ha and Michael D. Wallis and Mladen A. Vouk and James C. Lester",
	booktitle     = "{Educational Data Mining 2010, The Third International Conference on Educational Data Mining, Pittsburgh, PA, USA, June 11-13, 2010. Proceedings}",
	ee            = "http://educationaldatamining.org/EDM2010/uploads/proc/edm2010_submission_51.pdf",
	isbn          = "978-0-615-37529-8",
	pages         = "285--286",
	publisher     = "{www.educationaldatamining.org}",
	title         = "{A Preliminary Investigation of Hierarchical Hidden Markov Models for Tutorial Planning}",
	year          = 2010,
}