00582naa#a2200181#i#450# EN\\bibl\5127 20241021022114.1 2308-8877 20150316b2015####ek#y0engy0150####ca RUS RU Results production tests combination drills on stumps Journal article Voronezh FSBE Institution of Higher Education Voronezh State University of Forestry and Technologies named after G.F. Morozov 2015 3 с. Journal article local Fedorov O. Rybalkin D. naukaru.ru