TY JOUR TI Current state of the market of biopower technologies KW bioenergetics KW fuel KW complex preparation of wood biomass JO Actual directions of scientific researches of the XXI century: theory and practice AU Fokin, S.. PY 2014 IS 2 PB FSBE Institution of Higher Education Voronezh State University of Forestry and Technologies named after G.F. Morozov