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Sumo, R., Valk, W. van der, Weele, A.J. van, & Duijsters, G. (2016). How incomplete contracts foster innovation in inter-organizational relationships. European Management Review, 13(3), 179-192.
Sumo, R., Valk, W. van der, Bode, C., & Weele, A.J. van (2016). Fostering incremental and radical innovation Through performance-based contracting in buyer-supplier relationships. International Journal of Operations and Production Management, 36(11), 1482-1503.
Sumo, R., Valk, W. van der, Weele, A.J. van, & Duijsters, G. (2016). How Performance-Based Contracts can foster Innovation in Outsourced Service Delivery. Industrial Marketing Management, 59(1), 12-24.
Valk, W. van der, Sumo, R., Dul, J. Schroeder, R. (2016). When are contracts and trust necessary for innovation in buyer-supplier relationships? Journal of Purchasing and Supply Management, 22(4), 266-277.
R. Sumo, W. Van der Valk, G. Duijsters, and A. van Weele (2014). Incomplete Contracting in Strategic Alliances: The Quest for Innovation, in the book: Strategic Alliances for Innovation and R&D by T. K. Das (Ed.).