Techarungpaisan, P., Shithongtum, A., Buddadee, B., Pumchumpol, S. and Pumchumpol, S. 2017. Performance improvement of thermosyphon solar water heater: minimizing water flow rate in some risers of the solar collector (Thai). Asia-Pacific Journal of Science and Technology. 14, 1 (Apr. 2017), 41–54.