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@article{TUW-120734,
    author = {Frank, Andrew U.},
    title = {Wayfinding for Public transportation Users as Navigation in a Product of Graphs},
    journal = {{\"O}sterreichische Zeitschrift f{\"u}r Vermessung und Geoinformation (VGI), begutachteter Spezialband},
    year = {2007},
    volume = {2},
    pages = {195--200},
    url = {http://publik.tuwien.ac.at/files/pub-geo_1781.pdf}
}