@inproceedings{DBLP:conf/uic/YazjiCDS09,
  author    = {Sausan Yazji and
               Xi Chen and
               Robert P. Dick and
               Peter Scheuermann},
  title     = {Implicit User Re-authentication for Mobile Devices},
  booktitle = {UIC},
  year      = {2009},
  pages     = {325-339},
  ee        = {http://dx.doi.org/10.1007/978-3-642-02830-4_25},
  crossref  = {DBLP:conf/uic/2009},
  bibsource = {DBLP, http://dblp.uni-trier.de}
}

@proceedings{DBLP:conf/uic/2009,
  editor    = {Daqing Zhang and
               Marius Portmann and
               Ah-Hwee Tan and
               Jadwiga Indulska},
  title     = {Ubiquitous Intelligence and Computing, 6th International
               Conference, UIC 2009, Brisbane, Australia, July 7-9, 2009.
               Proceedings},
  booktitle = {UIC},
  publisher = {Springer},
  series    = {Lecture Notes in Computer Science},
  volume    = {5585},
  year      = {2009},
  isbn      = {978-3-642-02829-8},
  ee        = {http://dx.doi.org/10.1007/978-3-642-02830-4},
  bibsource = {DBLP, http://dblp.uni-trier.de}
}