Balodis, Oskars, Jānis Bartuševics, and Zinta Gaile. “Biomass Yield of Different Plants for Biogass Production”. ENVIRONMENT. TECHNOLOGIES. RESOURCES. Proceedings of the International Scientific and Practical Conference 1 (August 5, 2015): 238–245. Accessed September 19, 2024. https://journals23.rta.lv/index.php/ETR/article/view/884.