@misc{de_Boer_R._On_1975,
 author={de Boer, R.},
 volume={27},
 number={5-6},
 copyright={Creative Commons Attribution BY 4.0 license},
 address={Warszawa},
 journal={Archives of Mechanics},
 howpublished={online},
 year={1975},
 publisher={Polish Scientific Publishers IFTR},
 language={eng},
 language={pol},
 language={rus},
 type={Text},
 title={On the existence of solutions in viscoplasticity},
 URL={http://www.rcin.org.pl/Content/138507/PDF/WA727_92855_P.262a-de-Boer-Existence.pdf},
 keywords={Mechanika stosowana - czasopisma [KABA]},
}