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Review of Income and Wealth > 63 > s2 > S411 - S436
IEEE Transactions on Engineering Management > 2014 > 61 > 4 > 610 - 622
IEEE Transactions on Engineering Management > 2011 > 58 > 2 > 212 - 227
The Journal of Technology Transfer > 2011 > 36 > 2 > 145-172
Research Policy > 2009 > 38 > 9 > 1438-1445