1. Devogele, T., Parent, C and Spaccapietra, S. (1998) On spatial database integration. INT J GEOGR INF SCI, 12 (3), 335 – 352.
2. Eng, M. (2009) A quality analysis of OpenStreetMap data. Dissertation. University College London.
3. Goodchild, M.F. (2006) Foreword, In: Devillers, R and Jeansoulin, R (ed.) Fundamentals of Spatial Data Quality. ISTE, London, 13–16.
4. Hakley, M. (2009) How good is OpenStreetMap information? A comparative study of OpenStreetMap and Ordnance Survey datasets for London and the rest of England. Retrieved December, 10, from London’s Global University:
http://www.ucl.ac.uk/~ucfamha/OSM%20data%20analysis%20070808_web.p
df
5. ISO 14825 (2004) Intelligent transport systems - Geographic Data Files (GDF) - Overall data specification. City.