00579naa#a2200169#i#450# EN\\bibl\8004 20241228165921.6 2308-8877 20151105b2015####ek#y0engy0150####ca RUS RU Optimal control problems for elliptic equations with control in the coefficients Journal article Voronezh FSBE Institution of Higher Education Voronezh State University of Forestry and Technologies named after G.F. Morozov 2015 2 с. Journal article local Kasymova R. zh-szf.ru