00638naa#a2200193#i#450# EN\\bibl\9385 20240520214518.1 2308-8877 20151105b2015####ek#y0engy0150####ca RUS RU A Jordan canonical form of companion matrix for differential equations Journal article Voronezh FSBE Institution of Higher Education Voronezh State University of Forestry and Technologies named after G.F. Morozov 2015 3 с. Journal article local Klochkov S. Nesterov I. Chursanova A. anni.editorum.ru