@inproceedings{DBLP:conf/hri/PatelMD11,
  author    = {Mitesh Patel and
               Jaime Valls Mir{\'o} and
               Gamini Dissanayake},
  title     = {Activity recognition from the interactions between an assistive
               robotic walker and human users},
  booktitle = {HRI},
  year      = {2011},
  pages     = {221-222},
  ee        = {http://doi.acm.org/10.1145/1957656.1957741},
  crossref  = {DBLP:conf/hri/2011},
  bibsource = {DBLP, http://dblp.uni-trier.de}
}

@proceedings{DBLP:conf/hri/2011,
  editor    = {Aude Billard and
               Peter H. Kahn Jr. and
               Julie A. Adams and
               J. Gregory Trafton},
  title     = {Proceedings of the 6th International Conference on Human
               Robot Interaction, HRI 2011, Lausanne, Switzerland, March
               6-9, 2011},
  booktitle = {HRI},
  publisher = {ACM},
  year      = {2011},
  isbn      = {978-1-4503-0561-7},
  bibsource = {DBLP, http://dblp.uni-trier.de}
}