TY CONF TI MODELING THE GROWTH DYNAMICS OF SECONDARY WOODY PLANTINGS AND OBJECTS IN FOREST STANDS KW renewable biofuel KW pellets KW oak coppicing KW ecological-physiological model KW undergrowth KW young growth KW branches JO INDUSTRIAL THERMAL POWER ENGINEERING AU Lisitsyn, V.I. AU Matveev, N.N. AU Evsikova, N.Y. AU Kamalova, N.S. AU Vnukova, S.V. PY 2026 PB FSBE Institution of Higher Education Voronezh State University of Forestry and Technologies named after G.F. Morozov