“…Recently, Zhou [7], Chen et al [19], Losada et al [20], and Banaś and O'Regan [21] investigated the attractivity of solutions for fractional ordinary differential equations and integral equations. On the other hand, the existence theory of solutions for time fractional evolution equations has been investigated intensively by many authors; for example, see Kim et al [16], Bazhlekova [22], Wang et al [23], Zacher [24], and Zhou et al [25].…”