TY JOUR TI Summary Comparative studies of the relationship between the thickness and height of tree trunks of different species KW stand structure KW diameter distribution KW asymmetry index KW steepness index KW tree species KW stand productivity KW wood volume JO Forestry Engineering Journal AU Petrin, R.D. PY 2026 IS 16 PB FSBE Institution of Higher Education Voronezh State University of Forestry and Technologies named after G.F. Morozov