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2. Nearest Neighbor and Reverse Nearest Neighbor Queries for Moving Objects;Benetis,2002
3. On Finding Minimum Routes in a Network With Turn Penalties;Caldwell;CACM,1961
4. Improvements to Utah's Location Referencing System to Allow Data Integration;Deighton,1993
5. VIS-brugerhndbog: Vejledning i opmling og inddatering;Djern˦s,2002