Teerawat Klabklay และ Tawit Chitsomboon. (2018) Optimum pitch angle of downwind Thai sail windmill for maximum annual energy production. <i>Songklanakarin Journal of Science and Technology</i>, <i>40</i>(6), 1473-1478.Teerawat Klabklay และ Tawit Chitsomboon. "Optimum pitch angle of downwind Thai sail windmill for maximum annual energy production". Songklanakarin Journal of Science and Technology 40 (2018):1473-1478.Teerawat Klabklay และ Tawit Chitsomboon. Optimum pitch angle of downwind Thai sail windmill for maximum annual energy production. Research and Development Office, Prince of Songkla University:ม.ป.ท. 2018.