@article{Chetverikova2014differential, author={Chetverikova, I.. and Skripets, A..}, title={Differential equations for calculating the time of reformation multi raft}, journal={Actual directions of scientific researches of the XXI century: theory and practice}, publisher={FSBE Institution of Higher Education Voronezh State University of Forestry and Technologies named after G.F. Morozov}, year={2014}, pages={155-158}, volume={2}, issue={4}, }