On the elemental composition estimation of some herbal species of calcareous steppes and its bioindication prospectsNataly Prokhorova, Rezida Sarvarova, Yuly Makarova, Sergey Bugrov and Oxana KuzovenkoE3S Web Conf., 265 (2021) 01029DOI: https://doi.org/10.1051/e3sconf/202126501029