Chinh, Nguyen Thuy, Tran Do Mai Trang, Nguyen Thi Tuyet, Nguyen Nhat Oanh, Tran Thi Mai, Nguyen Thi Thu Trang, and Thai Hoang. 2018. “Adsorption of Mercuric Ion from Aqueous Solutions Using Modified Fly Ash”. <i>Vietnam Journal of Science and Technology</i> 56 (6). Hanoi, VN:688-97. https://doi.org/10.15625/2525-2518/56/6/12664.