East Asian Math. J., cilt.23, sa.2, ss.197-206, 2007 (Hakemli Dergi)
The purpose of this paper is to show some results of M. Bresar and J. Vukman concerning orthogonal derivations of semiprime rings in [3] for (σ,τ)−derivations and generalized (σ,τ)−derivations in Γ−rings.