@misc{Piekarski_Jacek_Computation,
 author={Piekarski, Jacek},
 address={Koszalin},
 howpublished={online},
 publisher={Politechnika Koszalińska},
 language={eng},
 type={artykuł w czasopiśmie},
 title={Computation of filtration bed porosity based on selected filtration coefficient equations by applicationof numerical methods},
 keywords={gravitational filtration, bed porosity, mathematical modelling},
}