Sekeroglu G, Karaboga K. The effect of marketing and R&D expenditures on firm profitability and stock return: Evidence from BIST. Int. J. Optim. Control, Theor. Appl. (IJOCTA) [Internet]. 2023 Jan. 24 [cited 2025 Jan. 27];13(1):35-4. Available from: http://ijocta.org/index.php/files/article/view/1238