@misc{Ludwig_W._Invariance_1976,
 author={Ludwig, W.},
 volume={28},
 number={3},
 copyright={Creative Commons Attribution BY 4.0 license},
 address={Warszawa},
 journal={Archives of Mechanics},
 howpublished={online},
 year={1976},
 publisher={Polish Scientific Publishers IFTR},
 language={eng},
 language={pol},
 language={rus},
 title={Invariance conditions in the transmition from discrete lattice models to the continuum limit},
 type={Text},
 URL={http://rcin.org.pl/Content/130983/PDF/WA727_92395_P.262b-Ludwig-Invariance.pdf},
 keywords={Mechanika stosowana - czasopisma [KABA]},
}