Published Research Articles Below is a listing of published research articles by year. For additional research and abstracts, click here. 201520142013201220112010200920082007200620052004200320022001200019981996199419932015 2014 2013 2012 2011 2010 2009 2008 2007 2006 2005 2004 2003 2002 2001 2000 1998 1996 1994 1993