Benzid Y, Chermat I, Khouatra S. An Empirical Analysis of Cost Efficiency in GCC Banking Sector: A Comparative Study between Islamic & Conventional Banks. CJFA [Internet]. 2026 Sep. 21 [cited 2026 Oct. 8];15(2):29-48. Available from: https://apcz.umk.pl/CJFA/article/view/73330