@ARTICLE{_Contents_2020,
 volume={68},
 number={6},
 journal={Bulletin of the Polish Academy of Sciences Technical Sciences},
 pages={1243},
 howpublished={online},
 year={2020},
 type={Contents},
 title={Contents},
 URL={http://www.journals.pan.pl/Content/119042/PDF/00_1243-1243_Spis%20tresci_Bpast.No.68-6_29.12.20_.pdf},
}