@misc{560,
  author = {H. Jeong and A. Gupta and R. Roscoe and J. Wagster and G. Biswas and D. Schwartz},
  title = {Using hidden markov models to characterize student behaviors in learning-by-teaching environments},
  year = {2008},
  journal = {In Intelligent Tutoring Systems: Vol. 5091. Lecture Notes in Computer Science},
  pages = {614-625},
  address = {Montreal, Canada: Springer.},
}