1. Abreu, M., and Mendes, V. (2002). Commercial bank interest
margins and profitability: Evidence from E.U. countries.
University of Porto Working Paper Series, 122.
2. BRSA. (2010). Sorularla Basel III. Retrieved from https://
www.bddk.org.tr/ContentBddk/dokuman/duyuru_basel_
0001_53.pdf
3. BRSA. (2018). 2018 annual report. Retrieved from https://www.
bddk.org.tr/ContentBddk/dokuman/hakkinda_0013_06.
pdf
4. BRSA. (2019). Turkish banking sector main indicators June
2019. Retrieved from https://www.bddk.org.tr/ContentBddk/
dokuman/veri_0023_08.pdf
5. Berger, A. N. (1995). The profit-structure relationship in banking--
tests of market-power and efficient-structure hypotheses.
Journal of Money Credit and Banking, 27(2), 404-431.