@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.czasopisma.pan.pl/Content/119042/PDF-MASTER/00_1243-1243_Spis%20tresci_Bpast.No.68-6_29.12.20_.pdf}, }