Research Policy
Research Policy > 2015 > 44 > 4 > 849-861
Research Policy > 2015 > 44 > 4 > 936-950
Research Policy > 2015 > 44 > 8 > 1462-1472
Research Policy > 2015 > 44 > 4 > 849-861
Research Policy > 2015 > 44 > 4 > 936-950
Research Policy > 2015 > 44 > 8 > 1462-1472