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International Journal of Production Economics > 2012 > 139 > 2 > 359-365
IEEE Pervasive Computing > 2010 > 9 > 2 > 64 - 71
International Journal of Production Economics > 2012 > 139 > 2 > 359-365
IEEE Pervasive Computing > 2010 > 9 > 2 > 64 - 71