@InProceedings{iWalker-TAR-2009,
  author = {Thomas R{\"o}fer and Tim Laue and Bernd Gersdorf},
  title = {iWalker - An Intelligent Walker providing Services for the Elderly},
  year = {2009},
  address = {Berlin, Germany},
  booktitle = {Technically Assisted Rehabilitation 2009},
}