TY JOUR TI Study of genetic diversity of bovine leukemia virus isolates obtained in the Belgorod region KW bovine leukemia virus KW molecular genetic characteristics KW phylogenetics KW hematology KW cattle KW genotyping KW DNA sequencing KW enzyme polymorphism reaction JO Agrarian Bulletin of the AU Petropavlovskiy, M.V. AU Donnik, I.M. AU Bezborodova, N.A. AU Kovalenko, A.M. AU Belyaeva, S.N. PY 2023 IS 229 PB Ural State Agrarian University