Elemental and molecular composition of humic acids isolated from soils of tallgrass temperate rainforests (Chernevaya taiga) by 1H-13C HECTCOR NMR spectroscopy / V. I. Polyakov,S. V. Loiko, G. I. Istigechev [et al.] // Agronomy. 2021. Vol. 11, № 10. P. 1998 (1-15). URL: http://vital.lib.tsu.ru/vital/access/manager/Repository/koha:000895922