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Computers & Electrical Engineering > 2015 > 48 > C > 86-99
Journal of Network and Computer Applications > 2012 > 35 > 5 > 1606-1614
Procedia Engineering > 2012 > 38 > C > 1084-1093
Pervasive and Mobile Computing > 2009 > 5 > 1 > 1-18