@inproceedings{TUW-271251, author = {Retscher, G{\"u}nther}, title = {Positioning in Location-based Services with an Emphasis on Indoor Environments}, booktitle = {Workshop on Positioning and Navigation}, year = {2018}, pages = {1--100}, note = {invited; talk: Workshop on Positioning and Navigation at the Faculty of Geomatics of Sabaragamuwa University of Sri Lanka, Belihuloya, Sri Lanka; 2018-07-07 -- 2018-07-08} }