Kovtun В., and Kovtun Л. “GENETIC SOURCES OF HIGH FROST TOLERANCE AND WINTER HARDINESS OF SOFT WINTER WHEAT”. Agricultural Journal ISSN (Print): 2687-1246, ISSN (Online): 2687-1254, vol. 14, no. 2, Sept. 2021, doi:10.25930/2687-1254/004.2.14.2021.