@ARTICLE{Chekurin_V._A_2015,
 author={Chekurin, V. and Ponomaryov, Yu. and Khymko, O.},
 number={No 3},
 journal={ECONTECHMOD},
 howpublished={online},
 year={2015},
 publisher={Polish Academy of Sciences Branch in Lublin},
 publisher={Lviv Polytechnic National University},
 publisher={Foundry Research Institute in Cracow},
 title={A mathematical model for evaluation the efficiency of gas-main pipelines in transient operational modes},
}