@misc{Nielsen_J._Model_1977,
 author={Nielsen, J.},
 volume={29},
 number={4},
 copyright={Licencja Creative Commons Uznanie autorstwa 4.0},
 address={Warszawa},
 journal={Archives of Mechanics},
 howpublished={online},
 year={1977},
 publisher={Polish Scientific Publishers IFTR},
 language={eng, streszcz. eng, pol, ros},
 type={Tekst},
 title={Model laws for granular media and powders with a special view to silo models},
 URL={http://rcin.org.pl/ippt/Content/102683/PDF/WA727_91308_P.262a-Nielsen-Model.pdf},
 keywords={Mechanika stosowana - czasopisma [KABA]},
}