Hiep, Le. “DETERMINATION OF RATIONAL PARAMETERS OF VERTICAL TUBULAR THERMOSIPHON SOLAR HOT WATER SYSTEMS”. Science and Technology Development Journal 5, no. 1&2 (February 28, 2002): 66-71. Accessed December 22, 2024. http://stdj.scienceandtechnology.com.vn/index.php/stdj/article/view/3403.