TY JOUR TI INTEGRO-DIFFERENTIAL EQUATION WITH FEATURE IN A BANACH SPACE KW integral equation KW Banach space KW operator bundle KW spectrum JO Voronezh Scientific-Technical Bulletin AU Sapronov, I.V. AU Spirina, N.M. AU Zenina, V.V. PY 2020 IS 3 PB FSBE Institution of Higher Education Voronezh State University of Forestry and Technologies named after G.F. Morozov