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@article{TUW-271438,
    author = {Huang, Haosheng and Gartner, Georg},
    title = {Current Trends and Challenges in Location-Based Services},
    journal = {ISPRS International Journal of Geo-Information},
    year = {2018},
    volume = {7},
    number = {6},
    doi = {10.3390/ijgi7060199},
    keywords = {location based services; LBS; context-aware services; positioning; mobile interfaces; privacy; tracking; global positioning system (GPS)}
}