@article{UBHD-68868195, author={Roick, Oliver and Heuser, Susanne}, title={Location based social networks}, subtitle={definition, current state of the art and research agenda}, year={2013}, pages={763-784}, language={eng}, issn={1467-9671}, volume={17}, number={5}, note={Gesehen am 19.01.2022}, journal={Transactions in GIS}, doi={10.1111/tgis.12032}, }