Kolodynskij, Vitalij, and Pranas Baltrėnas. “Experimental Research of Biogas Yield and Quality Produced from Chicken Manure”. International Conference “Environmental Engineering” 10 (January 1, 2017): 1–7. Accessed May 24, 2026. https://conferences.vilniustech.lt/index.php/ENVIRO/article/view/1118.