00552naa#a2200169#i#450# EN\\bibl\2317 20241012062456.6 2219-0767 20140121b2014####ek#y0engy0150####ca RUS RU The analysis of the indices verify cluster solutions Journal article Voronezh FSBE Institution of Higher Education Voronezh State University of Forestry and Technologies named after G.F. Morozov 2014 4 с. Journal article local Tlegenov B. naukaru.ru