TY JOUR TI REFINEMENT OF CONIFER GROWTH MODELS BASED ON TREE-RING CHRONOLOGIES OF THE NORTH OF WESTERN SIBERIA KW JO Bulletin of Nizhnevartovsk State University AU Tsibulsky, V.R. AU Solovyev, I.G. AU Govorkov, D.A. PY 2020 IS PB Nizhnevartovsk State University