@article{John2015,
  title = {A Tablet-based virtual environment for neurosurgery training},
  author = {John, Nigel W and Phillips, Nicholas I and ap Cenydd, Llyr and Coope, David and Carleton-Bland, Nick and Kamaly-Asl, Ian and Grey, William P},
  year = {2015},
  journal = {Presence: Teleoperators and Virtual Environments},
  volume = {24},
  issue = {2},
  pages = {155–162}
}