TY - JOUR AU - TI - Towards an open R&D system: Internal R&D investment, external knowledge acquisition and innovative performance JF - Research Policy DO - 10.1016/j.respol.2012.04.017 DA - 2013-02-01 UR - https://www.deepdyve.com/lp/crossref/towards-an-open-r-d-system-internal-r-d-investment-external-knowledge-DrvbnIo63J SP - 117 EP - 127 VL - 42 IS - 1 DP - DeepDyve ER -