Daugėla, Aurelijus, Džigita Nagrockienė, and Laurynas Zarauskas. “Biofuel Combustion Fly Ash Influence on the Properties of Concrete”. Mokslas – Lietuvos ateitis / Science – Future of Lithuania 7, no. 5 (February 2, 2016): 546-550. Accessed September 22, 2021. https://journals.vgtu.lt/index.php/MLA/article/view/2756.