Suwannapan, S., S. Skullong, and P. Promvonge. “Thermal Characteristics in a Heat Exchanger Tube Fitted With zigzag‐winglet perforated‐tapes”. Journal of Research and Applications in Mechanical Engineering, vol. 3, no. 1, Aug. 2018, pp. 29-36, https://ph01.tci-thaijo.org/index.php/jrame/article/view/141535.