@misc{Perzyna_P._Description_1989,
 author={Perzyna, P. and Drabik, A.},
 volume={41},
 number={6},
 copyright={Creative Commons Attribution BY 4.0 license},
 journal={Archives of Mechanics},
 address={Warszawa},
 howpublished={online},
 year={1989},
 publisher={Polish Scientific Publishers IFTR},
 language={eng},
 title={Description of micro-damage process by porosity parameter for nonlinear viscoplasticity},
 type={Text},
 URL={http://www.rcin.org.pl/Content/78391/PDF/WA727_18054_41-6-1989_AMS_Perzyna-08.pdf},
 keywords={Mechanika stosowana - czasopisma [KABA]},
}