Matijošius, Jonas, and Arūnas Jakštas. “Efficiency Investigation of Solar Collectors Made of Recycling Materials”. Journal of Environmental Engineering and Landscape Management 13, no. 3 (September 30, 2005): 126-131. Accessed November 26, 2024. https://tede.vgtu.lt/index.php/JEELM/article/view/8048.