@inproceedings{DBLP:conf/chi/VogelCCBK09,
  author    = {Daniel Vogel and
               Matthew Cudmore and
               G{\'e}ry Casiez and
               Ravin Balakrishnan and
               Liam Keliher},
  title     = {Hand occlusion with tablet-sized direct pen input},
  booktitle = {CHI},
  year      = {2009},
  pages     = {557-566},
  ee        = {http://doi.acm.org/10.1145/1518701.1518787},
  crossref  = {DBLP:conf/chi/2009},
  bibsource = {DBLP, http://dblp.uni-trier.de}
}

@proceedings{DBLP:conf/chi/2009,
  editor    = {Dan R. Olsen Jr. and
               Richard B. Arthur and
               Ken Hinckley and
               Meredith Ringel Morris and
               Scott E. Hudson and
               Saul Greenberg},
  title     = {Proceedings of the 27th International Conference on Human
               Factors in Computing Systems, CHI 2009, Boston, MA, USA,
               April 4-9, 2009},
  booktitle = {CHI},
  publisher = {ACM},
  year      = {2009},
  isbn      = {978-1-60558-246-7},
  bibsource = {DBLP, http://dblp.uni-trier.de}
}