@misc{Prager_W._Convexity_1972,
 author={Prager, W.},
 volume={24},
 number={5-6},
 copyright={Creative Commons Attribution BY 4.0 license},
 address={Warszawa},
 journal={Archives of Mechanics},
 howpublished={online},
 year={1972},
 publisher={Polish Scientific Publishers IFTR},
 language={eng},
 language={pol},
 language={rus},
 language={fre},
 type={Text},
 title={Convexity in plasticity},
 URL={http://www.rcin.org.pl/Content/203891/PDF/WA727_118322_P.262-Prager-Convex.pdf},
 keywords={Mechanika stosowana - czasopisma [KABA]},
}