Doloreux, David, Richard Shearmur, and Mercedes Rodriguez. “Internal R&D and External Information in Knowledge-Intensive Business Service Innovation: Complements, Substitutes or Independent?”. Technological and Economic Development of Economy 24, no. 6 (November 21, 2018): 2255-2276. Accessed November 26, 2024. https://tede.vgtu.lt/index.php/TEDE/article/view/5694.