ÖZER G, ÇAM İlhan, KOCAMAN M. THE NONLINEAR IMPACT OF RESEARCH AND DEVELOPMENT INVESTMENTS ON FIRM PERFORMANCE: A SIGMOID (S) CURVE APPROACH IN G20 COUNTRIES. SSD Journal [Internet]. 2023 Sep. 15 [cited 2024 Nov. 24];8(39):299-321. Available from: https://ssdjournal.org/index.php/pub/article/view/505