KOOLNAPADOL, N.; SRIPATTANAPIPAT, S.; SKULLONG, S. Effect of pitch spring of delta-winglets on thermal characteristics in a heat exchanger tube. Journal of Research and Applications in Mechanical Engineering, [S. l.], v. 4, n. 2, p. 166–174, 2018. Disponível em: https://ph01.tci-thaijo.org/index.php/jrame/article/view/138646. Acesso em: 3 dec. 2022.