Koolnapadol, N., Tamna, S., Chingtuaythong, W., Skullong, S. and Promvonge, P. (2016) “Experimental investigation on convection heat transfer in solar air heater with perforated-winglet vortex generators”, Engineering and Applied Science Research, 43, pp. 287–290. available at: https://ph01.tci-thaijo.org/index.php/easr/article/view/70215 (accessed: 24 September 2026).