Nguyen, Bao, Tue Nguyen, and Tuan Dao. “Feasibility Study of Domestic Cooling Storage Balls to Reduce the Energy Cost of Central Air Conditioning System”. VNUHCM Journal of Science and Technology Development 16, no. 2 (June 30, 2013): 73-81. Accessed July 2, 2025. http://stdj.scienceandtechnology.com.vn/index.php/stdj/article/view/1518.