@ARTICLE{_Contents_2020,
 volume={68},
 number={No. 3},
 journal={Bulletin of the Polish Academy of Sciences Technical Sciences},
 pages={339},
 howpublished={online},
 year={2020},
 type={Contents},
 title={Contents},
 URL={http://journals.pan.pl/Content/117619/PDF-MASTER/pan_doi_blank.pdf},
}