scientific article published in December 2020

scientific article published in August 2013

scientific article published in December 1993

scientific article published in October 2006

scientific article published in February 1998

scientific article published in March 1999

scientific article published in February 1999

scientific article published in December 1996

scientific article published in September 2009

scientific article published in January 2005

scientific article published in February 2002

scientific article published in January 1994

scientific article published in March 2006

scientific article published in January 2003

scientific article published in February 2012

scientific article published in January 2005

scientific article published in August 2004