@article{Savelyev2019substantiation, author={Savelyev, Y.A. and Mashkov, S.V. and Ishkin, P.A. and Petrov, M.A.}, title={SUBSTANTIATION OF NEEDLE SHAPE OF TRACTION-DRIVEN TILLAGE TOOLS}, journal={Bulletin Samara State Agricultural Academy}, publisher={Samara State Agrarian University}, year={2019}, pages={20-28}, volume={4}, issue={4}, }