TY JOUR TI Evaluation of fill factor buildup for a log raft formed of rectangular rafting units KW rafting unit rectangular KW coefficient of raft density JO Actual directions of scientific researches of the XXI century: theory and practice AU Surov, G.. AU Shtaborov, D.. PY 2015 IS 3 PB FSBE Institution of Higher Education Voronezh State University of Forestry and Technologies named after G.F. Morozov