Alwan, Gufran Hatam, and Mohammed A. Mahmoud. “Measuring the Effect of Banking Financial Indicators on Investment Banking for a Sample of Iraqi Private Commercial Bank Using Longitudinal Data Models”. Tikrit Journal of Administrative and Economic Sciences, vol. 17, no. 54, 3, June 2021, pp. 250-64, doi:10.25130/tjaes.17.54.3.16.