TY JOUR TI Analysis of a certain multi-section elastic system KW differential equation KW mathematical model JO Actual directions of scientific researches of the XXI century: theory and practice AU Perlovskaya, T.. AU Krasova, N.. PY 2014 IS 2 PB FSBE Institution of Higher Education Voronezh State University of Forestry and Technologies named after G.F. Morozov