Zairul Azrul Zakaria, et al. “Investigation on The Thermal Performance of Evacuated Glass-Thermal Absorber Tube Collector (EGATC) for Air Heating Application”. Journal of Advanced Research in Fluid Mechanics and Thermal Sciences, vol. 79, no. 2, Mar. 2024, pp. 48-64, https://semarakilmu.com.my/journals/index.php/fluid_mechanics_thermal_sciences/article/view/7207.