Ameen, Braa Khalid, Mustafa B. Al-Hadithi, and Obaid T. Fadhil. 2017. “Heat Transfer Enhancement of Flat Plate Solar Collectors for Water Heating in Iraq Climatic Conditions”. Al-Nahrain Journal for Engineering Sciences 18 (2): 259-72. https://nahje.com/index.php/main/article/view/187.