00613naa#a2200181#i#450# EN\\bibl\3170 20250110055055.5 2308-8877 20140617b2014####ek#y0engy0150####ca RUS RU Cobb-douglas function when assessing the development of agriculture of kursk area Journal article Voronezh FSBE Institution of Higher Education Voronezh State University of Forestry and Technologies named after G.F. Morozov 2014 3 с. Journal article local Zyukin D. Zhilin V. anni.editorum.ru