Websites

1. F.L. Borchardt. "World Tour May '04." May, 2004.
   <http://www.duke.edu/~frankbo/WorldTrip_04>
   (last updated on 2005/02/06)

   Author's Comments:
   Presentation in Barcelona, Berlin, Beijing in May '04

   Abstract:
   http://www.duke.edu/~frankbo/WorldTrip_04