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@inproceedings{TUW-119654,
    author = {Retscher, G{\"u}nther},
    title = {Pedestrian Navigation Systems and Location-based Services},
    booktitle = {5th IEE International Conference on 3G Mobile Communication Technologies 3G 2004},
    year = {2004},
    numpages = {5},
    note = {invited; talk: 5th IEE International Conference on 3G Mobile Communication Technologies 3G 2004, London, UK; 2004-10-18 -- 2004-10-20}
}