Klius, V., H. Chetveryk, and Z. Masliukova. “INCREASING OF ENERGY EFFECTIVE OF BIOGAS REACTORS”. Vidnovluvana energetika, no. 4(59) (December 27, 2019): 92-99. Accessed February 17, 2020. https://ve.org.ua/index.php/journal/article/view/235.