@incollection{TUW-119820, author = {Gartner, Georg and Uhlirz, Susanne}, title = {Map-based LBS}, booktitle = {Map-based mobile services - Theories, Methods and Implementations}, year = {2004}, editor = {Meng, Liqiu and Zipf, Alexander and Reichenbacher, Tumasch}, pages = {163--177}, publisher = {Springer}, isbn = {3540230556} }