The abstracts from previous conferences are available online here:

• 1st TWK (1998): PDF |  programme |  table of contents |  index
• 2nd TWK (1999): PDF |  programme |  table of contents |  index
• 3rd TWK (2000): PDF |  programme |  table of contents |  index
• 4th TWK (2001): PDF |  programme |  table of contents |  index
• 5th TWK (2002): PDF |  programme |  table of contents |  index

• 6th TWK (2003): website |  proceedings (PDF, 601kB)