Commutativity results for semiprime rings with derivations. Daif, Mohamad Nagy — 1998 International Journal of Mathematics and Mathematical Sciences
When is a multiplicative derivation additive? Daif, Mohamad Nagy — 1991 International Journal of Mathematics and Mathematical Sciences
Remarks on derivations on semiprime rings. Daif, Mohamad Nagy; Bell, Howard E. — 1992 International Journal of Mathematics and Mathematical Sciences