00572naa#a2200181#i#450# EN\\bibl\3210 20241219090609.4 2308-8877 20140617b2014####ek#y0engy0150####ca RUS RU On the boundedness of hamiltonian operators Journal article Voronezh FSBE Institution of Higher Education Voronezh State University of Forestry and Technologies named after G.F. Morozov 2014 2 с. Journal article local Gridneva I. Fedulova L. zh-szf.ru