SUMMARY AND COMPLETE TEXTS
OPUS 18.1 - June 2012
OPUS 17.2 - December 2011
OPUS 17.1 - June 2011
OPUS 16.2 - December 2010
OPUS 16.1 - June 2010
OPUS 15.2 - December 2009
OPUS 15.1 - June 2009
OPUS 14.2 - December 2008
OPUS 14.1 - June 2008
OPUS 13.2 - December 2007
OPUS 13.1 - June 2007
OPUS 12 - December 2006
OPUS 11 - December 2005
OPUS 10 - December 2004
OPUS 9 - December 2003
OPUS 8 - February 2002
OPUS 7 - October 2000
OPUS 6 - August 1999
OPUS 5 - August 1998
OPUS 4 - August 1997
OPUS 3 - September 1991
OPUS 2 - June 1990
OPUS 1 - December 1989
