Copyright question

[Aliaksei Sheshka]

Hi list!

Please help me clarify copyright terms for irrtoolset.
I'm trying to build Debian package and there is strong copyright policy there.
I have to extract information for fields like in the example:
Files: dist/Cwd/Cwd.xs
Copyright:
 Copyright (c) 2004 by the Perl 5 Porters.  All rights reserved.
 Copyright (c) 2003 Constantin S. Svintsoff <kostik at iclub.nsu.ru>
License: GPL-1+ or Artistic, and BSD-3-clause-GENERIC

Considering file http://irrtoolset.isc.org/browser/trunk/src/peval/peval.cc
What would the Copyright field ?
I guess "Cengiz Alaettinoglu <cengiz at ISI.EDU>", but which year should I put ?