@misc{Szemplińska-Stupnicka_W._On_1972,
 author={Szemplińska-Stupnicka, W.},
 volume={24},
 number={1},
 copyright={Licencja Creative Commons Uznanie autorstwa 4.0},
 journal={Archives of Mechanics},
 address={Warszawa},
 howpublished={online},
 year={1972},
 publisher={Polish Scientific Publishers IFTR},
 language={eng, streszcz. eng, pol, ros, fra},
 type={Tekst},
 title={On the averaging and W. Fitz methods in the theory of nonlinear resonances in vibrating systems with multiple degrees of freedom},
 keywords={Mechanika stosowana - czasopisma [KABA]},
}