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MSIE 2011 > 1269 - 1272
IEEE Systems Journal > 2011 > 5 > 2 > 256 - 265
Research Policy > 2009 > 38 > 7 > 1117-1124
MSIE 2011 > 1269 - 1272
IEEE Systems Journal > 2011 > 5 > 2 > 256 - 265
Research Policy > 2009 > 38 > 7 > 1117-1124