Nagy G. Submerged aquatic plant (Vallisneria spiralis and Egeria densa) utilisation as a biogas cleaner and feedstock of co-digestion. IJEMS [Internet]. 2019 Dec. 12 [cited 2024 May 6];4(4):172-80. Available from: https://ojs.lib.unideb.hu/IJEMS/article/view/5342