Outdoor Testing of a Zig-Zag Solar Air heater with and without Artificial Roughness on Absorber Plate. Journal of Engineering, [S. l.], v. 25, n. 4, p. 1–17, 2019. DOI: 10.31026/j.eng.2019.04.01. Disponível em: https://joe.uobaghdad.edu.iq/index.php/main/article/view/812.. Acesso em: 3 jul. 2024.