Bakkari, Belkheir, and Abderahmane Daggoume. 2017. “Study the Effect of Financial Leverage on Financial Return An Applied Study of a Sample of Institutions in the Hassi-Messaoud Region During the Period (2009-2014)”. Dirassat Journal Economic Issue 8 (1), 101-14. https://doi.org/10.34118/djei.v8i1.483.