@article{Khafizov2019theoretical,
author={Khafizov, K.. and Khafizov, R.. and Nurmiev, A.A. and Galiev, I.G.},
title={THEORETICAL BACKGROUND OF CREATING A MATHEMATICAL MODEL OF TRACTOR  TRACTION EFFICIENCY},
journal={Vestnik of Kazan State Agrarian University},
publisher={Kazan state agrarian University},
year={2019},
pages={116-121},
volume={14},
issue={3},
}