%0 Journal Article %T Optimal methods raft timber %A Perfilev, P.. %A Gumenchuk, A.. %K water transportation, optimization, timber. %J Actual directions of scientific researches of the XXI century: theory and practice %D 2015 %N 3 %P 3 %I FSBE Institution of Higher Education Voronezh State University of Forestry and Technologies named after G.F. Morozov