00542naa#a2200169#i#450# EN\\bibl\10144 20251221202930.7 2308-8877 20151203b2015####ek#y0engy0150####ca RUS RU On a class of transmutation operators Journal article Voronezh FSBE Institution of Higher Education Voronezh State University of Forestry and Technologies named after G.F. Morozov 2015 2 с. Journal article local Sitnik S. anni.editorum.ru