TY JOUR TI Using rapid degradation method in determining thermal resistance in the balls contact zone KW Fourier series KW contact thermal resistance KW spherical surfaces KW temperature field JO Actual directions of scientific researches of the XXI century: theory and practice AU Chernyshov, A.. AU Popov, V.. AU Novikov, A.. PY 2014 IS 2 PB FSBE Institution of Higher Education Voronezh State University of Forestry and Technologies named after G.F. Morozov