“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, vol. 16, no. 4, Nov. 2019, https://journals.vsu.ru/sorpchrom/article/view/1382.