@ARTICLE{_Contents_2021,
 volume={vol. 42},
 number={No 4},
 journal={Chemical and Process Engineering},
 howpublished={online},
 year={2021},
 publisher={Polish Academy of Sciences Committee of Chemical and Process Engineering},
 type={Contents},
 title={Contents of Chemical and Process Engineering vol. 42, 2021},
 URL={http://www.czasopisma.pan.pl/Content/122386/PDF/art10_final.pdf},
}