Edwardes, A J (2009). Geographical perspectives on location for location based services. In: Wilde, E. Proceedings of the 2nd International Workshop on Location and the Web. New York: Association for Computing Machinery, 13-16.
Dias, E S; Edwardes, A J; Purves, Ross S (2007). Analysing and aggregating visitor tracks in a protected area. In: 5th International Symposium on Spatial Data Quality, Enschede, 13 June 2007 - 15 June 2007, online.