@misc{Petryk_H._On_1985,
 author={Petryk, H.},
 volume={37},
 number={4-5},
 copyright={Creative Commons Attribution BY 4.0 license},
 address={Warszawa},
 journal={Archives of Mechanics},
 howpublished={online},
 year={1985},
 publisher={Polish Scientific Publishers IFTR},
 language={eng},
 type={Text},
 title={On stability and symmetry conditions in time-independent plasticity},
 URL={http://www.rcin.org.pl/Content/121117/PDF/WA727_18075_37-4-5-1985_AMS_Petryk-17.pdf},
 keywords={Mechanika stosowana - czasopisma [KABA]},
}