@conference{hendrix18,
  title = "Design and Development of an Authoring Tool for Pedagogical Relationship Types between Concepts",
  author = "D. Albert and A. Nussbaumer and C. M. Steiner and M. Hendrix and A. I. Cristea",
  year = 2009,
  booktitle = "Proceedings of the The 17th International Conference on Computers in Education ICCE 2009",
  publisher = "IEEE",
  url = "http://icce2009.ied.edu.hk/pdf/C1/proceedings194-196.pdf",
  keywords = "GRAPPLE project and Published during PhD at Warwick",
  series = "Proc. of 17th International Conference on Computers in Education ICCE 2009"
}