L. Xuan Thi, F. Duus, and L. Ngoc Thach, “EFFECTS OF ULTRASOUND AND MICROWAVE IRRADIATION ON THE GREEN OXIDATION OF ALKYLARENES BY KMnO4/CuSO4.5H2O”, Science and Technology Development Journal, vol. 11, no. 10, pp. 78-83, Oct. 2008.