1Hu Huo-Sheng , Gu Dong-Bing. Landmark-based navigation of industrial mobile robots. InternationalJournal of Industry Robot. 2000. 27(6): 458-467.
2Sorrows E. Hirtle S. The nature of landmarks for real and electronic spaces//Freksa C. Mark M eds. Spatial Information Theory. Berlin: Springer. 1999: 37-50.
3Raubal M. Winter S. Enriching wayfinding instructions with local landmarks//EgenhoferJ. Mark M eds, Geographic Information Science. Berlin: Springer. 2002: 243-259.
4Elias B. Extracting landmarks with data mining methodsll Kuhn W. Worboys F. Tirnpf S eds. Spatial Information Theory. Berlin: Springer. 2003: 375-389.
5Brenner C. Elias B. Extracting landmarks for car navigation systems using existing GIS databases and laser scanning// Proceedings of the ISPRS Workshop 'Photogrammetric Image Analysis'. Munchen , Germany. 2003: 131-136.
6Tomko M. Case study-assessing spatial distribution of web resources for navigation services//Proceedings of the 4th International Workshop on Web and Wireless Geographical Information System W2GIS 2004. Goyang , Korea. 2004: 90-104.
7Tezuka T. Tanaka K. Landmark extraction: A web mining approachl lCohn G. Mark M eds. Spatial Information Theory. Berlin: Springer. 2005: 379-396.
8Winter S. Tomko M. Elias B. Sester M. Landmark hierar?chies in context. Environment and Planning B: Planning and Design. 2008. 35(3): 381-398.
9Heipke C. Crowdsourcing geospatial data. ISPRSJournal of Photogrammetry and Remote Sensing. 2010. 65(6): 550-557.