“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”. Sorbtsionnye i Khromatograficheskie Protsessy 16, no. 4 (November 15, 2019). Accessed April 2, 2026. https://journals.vsu.ru/sorpchrom/article/view/1382.