00610naa#a2200181#i#450# EN\\bibl\3136 /en/manage/index 20250416012019.3 2308-8877 20140617b2014####ek#y0engy0150####ca RUS RU About spectrum differential operator with matrix potential Journal article Voronezh FSBE Institution of Higher Education Voronezh State University of Forestry and Technologies named after G.F. Morozov 2014 4 с. Journal article local Uskova N. test.editorum.ru /en/manage/index