@misc{Guo_Z.-H._The_1980,
 author={Guo, Z.-H.},
 volume={32},
 number={4},
 copyright={Creative Commons Attribution BY 4.0 license},
 address={Warszawa},
 journal={Archives of Mechanics},
 howpublished={online},
 year={1980},
 publisher={Polish Scientific Publishers IFTR},
 language={eng},
 language={pol},
 language={rus},
 title={The unified theory of variational principles in nonlinear elasticity},
 type={Text},
 URL={http://rcin.org.pl/ippt/Content/74758/PDF/WA727_89659_P.262_Guo-The-unified.pdf},
 keywords={Mechanika stosowana - czasopisma [KABA]},
}