Hassani, Mohsen, lal bar, Ali. “Investigating the Role of Internal Managers; Global Financial Crisis and Financial Constraints on the Relationship Between Financial Loss and the Intensity of Investment in Research and Development Spending in Information Technology Companies.” Roshd -e- Fanavari, vol. 17, no. 67, 2021, pp. 51-60. 10.52547/jstpi.20917.17.67.51