Parametric Study of Active Solar Heating Using a Pebble Bed as a Thermal Collector and Storage Unit. مجلة الهندسة, [S. l.], v. 20, n. 08, p. 52–69, 2014. DOI: 10.31026/j.eng.2014.08.04. Disponível em: https://joe.uobaghdad.edu.iq/index.php/main/article/view/2544.. Acesso em: 17 2024.