Bielskus, Juozas, Karolis Januševičius, and Vytautas Martinaitis. “A Comparison of the Thermodynamic Efficiency of Vacuum Tube and Flat Plate Solar Collector Systems”. Mokslas – Lietuvos ateitis / Science – Future of Lithuania 5, no. 4 (November 25, 2013): 404-409. Accessed December 22, 2024. https://journals.vilniustech.lt/index.php/MLA/article/view/3915.