“…where a, b, c, k ∈ C(R + ), a, b, c, k, w ∈ L 1 (R + ), w ∈ C((0, ∞)), T is a continuous operator, and w(u) is nondecreasing in u, u ≤ w(u), and Remark 3.10. Letting a(t) = 0 in Theorem 3.9, we obtain the same result as that of Corollary 3.4 in [13].…”