Ratti C.  2006.  Mobile landscapes: using location data from cell phones for urban analysis. Environment and Planning B: Planning and Design. 33(5):727-748.

Frenchman D.  2006.  Zaragoza's digital mile: Place-making in a new public realm. Places. 18(2):16-25.

Frenchman D.  2004.  Event-Places in North America: City Meaning and Making. Places. 16(3)

Ratti C.  2004.  Tangible User Interfaces (TUIs): a novel paradigm for GIS. Transactions in GIS. 8(4):407-421.