“The ability of freshwater filamentous sulfur bacteria from the family Beggiatoaceae to assimilate molecular nitrogen: molecular detection and expression of nifH - the marker gene of nitrogen fixation”, sorpchrom, vol. 16, no. 4, Nov. 2019, Accessed: Apr. 02, 2026. [Online]. Available: https://journals.vsu.ru/sorpchrom/article/view/1382