Duong, Pham Thuy, Reena Amatya Shrestha, Mika Sillanpää, and Jūratė Virkutytė. “Ultrasound‐assisted Treatment of Kaolin Artificially Contaminated With Phenanhtrene, Fluoranthene and Hexachlorobenzene”. Journal of Environmental Engineering and Landscape Management 18, no. 4 (December 31, 2010): 251-258. Accessed January 23, 2022. https://journals.vgtu.lt/index.php/JEELM/article/view/6092.