scientific article published in October 2012

scientific article published in January 2005

scientific article published in December 1993

scientific article published in September 1995

scientific article published in March 2000

scientific article published in November 2002

scientific article published in December 1997

scientific article published in October 2012

scientific article published in September 1997

scientific article published in January 2008

scientific article published in September 2003

scientific article published in April 1998

scientific article published in March 2000

scientific article published in September 1997

scientific article published in December 1993

scientific article published in July 2010

scientific article published in April 1995

scientific article published in January 1994

scientific article published in June 2003