scholarly article by Filippo Coarelli published in October 2011

scholarly article by Filippo Coarelli published in November 2010

scholarly article by Fllippo Coarelli published in November 2009

scholarly article by Filippo Coarelli published in September 2012

scholarly article by Helen Patterson published in November 2008

scientific article published in November 2009

article published in 2001

scientific article published in November 1998

scientific article published in November 2004