Improvement of the Solar-Thermal Characteristics of the Flat-Plate Collector Using a Composite Coating. Al-Nahrain Journal of Science, [S. l.], v. 24, n. 1, p. 24–29, 2021. Disponível em: https://anjs.edu.iq/index.php/anjs/article/view/2333. Acesso em: 15 apr. 2025.