@book{TUW-179737, author = {Raper, Jonathan and Gartner, Georg and Karimi, Hassan and Rizos, Chris}, title = {Journal of Location Based Services}, publisher = {Taylor {\&} Francis}, year = {2009}, series = {Journal of Location Based Services}, editor = {Raper, Jonathan and Gartner, Georg and Karimi, Hassan and Rizos, Chris}, issn = {1748-9725} }