@conference{LKS+09,
	author = {Tobias Lange and Marek Kowalkiewicz and Thomas Springer and Tobias Raub},
	title = {Overcoming challenges in delivering services to social networks in location centric scenarios},
	booktitle = {Proceedings of the International Workshop on Location Based Social Networks (LBSN’09)},
	year = {2009}
}