@ARTICLE{Kovalchyk_Yu._The_2014,
 author={Kovalchyk, Yu. and Govda, O.},
 number={No 4},
 journal={ECONTECHMOD},
 howpublished={online},
 year={2014},
 publisher={Polish Academy of Sciences Branch in Lublin},
 publisher={Lviv Polytechnic National University},
 publisher={Foundry Research Institute in Cracow},
 title={The calculation of discrete states probability of systemwith four units of harvesting techniques},
}