@inproceedings{xie2017semi,
  title={Semi-automatic Initial Registration for the iRay System: A User Study},
  author={Xie, Tian and Islam, Mohammad M and Lumsden, Alan B and Kakadiaris, Ioannis A},
  booktitle={4th International Conference on Augmented Reality, Virtual Reality and Computer Graphics},
  pages={33--42},
  month={June 12-15},
  year={2017},
  location={Ugento, Italy},
  doi={10.1007/978-3-319-60928-7_3},
  organization={Springer}
}