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