by Kobziev, V.S, Kobzieva, L.M
Published in Visnyk sil's'kohospodars'koi nauki (1975)

by Topikha, I.N, Kobzieva, L.M, Kononenko, N.V, Kobziev, V.S
Published in Visnyk sil's'kohospodars'koi nauki (1982)