TY JOUR TI Optimization of transport costs timber enterprises through minimization empty runs KW Wood KW hauling KW mathematical models KW optimization of transport costs. JO Actual directions of scientific researches of the XXI century: theory and practice AU Krupko, A.. AU Krupko, N.. PY 2015 IS 3 PB FSBE Institution of Higher Education Voronezh State University of Forestry and Technologies named after G.F. Morozov