1. Going Places in the Catalog Improved Geographic Access. http://ecai.org/imls2002/
2. Support for the learner What, When, Where, Who. http://ecai.org/imls2004/
3. Michael Buckland http://www.dlib.org/dlib/january99/buckland/01buckland.html
4. Combining time, place, and topic: The Electronic Cultural Atlas Initiative;Buckland;D-Lib Magazine,2004
5. Placing Cultural Events and Documents in Space and Time