Gavrilkova Е.А., S.U. Tleukenova, R.T. Mussina, and Kali А.К. 2022. “The Influence of Physical Factors on the Viability of the Seed Material Echinacea Purpureavariety ‘Livadia’”. Fundamental and Experimental Biology 106 (2):62-70. https://doi.org/10.31489/2022bmg2/62-70.