IJPE => Volume 143, Issue 1, 2013
PPC => Volume 22, Issue 8, 2011
JQME => Volume 17 issue 3, 2011
JOL => volume 4, Issue 2, 2012
JOL => volume 4, Issue 3, 2012
JOL => volume 4, Issue 4, 2012
IJPE => Volume 121, Issue 1, 2009
PPC => Volume 20, Issue 6, 2009
JQME => Volume 15, Issue 4, 2009
C&IE => Volume 58, Issue 2, 2010
JOL => Volume 2, Issue 1, 2009
JOL => Volume 2, Issue 2, 2008
JOL => Volume 2, Issue 3, 2009
JOL => Volume 2, Issue 4, 2009
JOL => Volume 3, Issue 1, 2009
IJPE => Volume 112, Issue 1, 2008
JQME => Volume 14, Issue 1, 2008