@article{Batmanov2019mathematical, author={Batmanov, E.. and Bulgakov, V.. and Guseinov, R..}, title={MATHEMATICAL MODELING IN THE STUDY OF ROUGHNESS AS APPLIED TO INTERNAL SURFACES}, journal={Vestnik of Astrakhan State Technical University. Series: Marine engineering and technologies}, publisher={Astrakhan State Technical University}, year={2019}, pages={27-33}, volume={2019}, issue={1}, }