00613naa#a2200181#i#450# EN\\bibl\9449 20241125155412.1 2308-8877 20151105b2015####ek#y0engy0150####ca RUS RU Assessment of using marginal analysis when forecasting the income of the company Journal article Voronezh FSBE Institution of Higher Education Voronezh State University of Forestry and Technologies named after G.F. Morozov 2015 4 с. Journal article local Kosykh E. Pytkina Lyudmila naukaru.ru