00571naa#a2200169#i#450# EN\\bibl\3216 20260109170735.5 2308-8877 20140617b2014####ek#y0engy0150####ca RUS RU On calculation of rotation of vector fields using the formula POINCARE Journal article Voronezh FSBE Institution of Higher Education Voronezh State University of Forestry and Technologies named after G.F. Morozov 2014 0 с. Journal article local Tsymbalova O. zh-szf.ru