In the present paper we study the operator defined by using the Ruscheweyh derivative Rmf(z) and the Sălăgean operator Smf(z), denoted Lmα : An → An, Lmα f(z) = (1−α)Rmf(z)+αSmf(z), z ∈ U, where An = {f ∈ H(U) : f(z) = ...