Report 1 - june 1995
Report 2 - june 1996
Report 3 - september 1997
Report 4 - october 1998
Report 5 - june 1999
Report 6 - june 2000
Report 7 - june 2001
Report 8 - june 2002
Report 9 - june 2003
Report 10 - june 2004
Report 11 - june 2005
Report reversibility- june 1998
Global assessment report - january 2006
Report 1 - june 1995