@incollection{TUW-137073,
    author = {Kalkusch, Michael and Lidy, Thomas and Knapp, Michael and Reitmayr, Gerhard and Kaufmann, Hannes and Schmalstieg, Dieter},
    title = {Structured Visual Markers for Indoor Pathfinding},
    booktitle = {Proceedings of the First IEEE International Workshop on ARToolKit},
    year = {2002},
    publisher = {IEEE},
    url = {http://www.ims.tuwien.ac.at/media/documents/publications/SignPostFinal.pdf},
    isbn = {0-7803-7680-3}
}