00573naa#a2200169#i#450# EN\\bibl\3976 20250501234610.4 2308-8877 20141113b2014####ek#y0engy0150####ca RUS RU THE SOLUTION OF OPTIMIZATION PROBLEMS BY MEANS OF MATHCAD AND MS EXCEL 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 Gubina S anni.editorum.ru