@ @article{assets04-hde,
  author = {Hub, A. and Diepstraten, J. and Ertl, T.},
  title  = {{Design and development of an indoor navigation and object identification system for the blind}},
  year   = {2004},
  pages  = {147--152},
  journal = {{SIGACCESS Access. Comput.}},
  number = {{77-78}},
  doi = {{http://doi.acm.org/10.1145/1029014.1028657}},
  publisher = {{ACM Press}}
}