2021. Certain Pairs of Generalized Derivations of Semiprime Rings. Journal of Al-Rafidain University College For Sciences ( Print ISSN: 1681-6870 ,Online ISSN: 2790-2293 ). 32, 2 (Oct. 2021), 247–264. DOI:https://doi.org/10.55562/jrucs.v32i2.338.