@ARTICLE{_Contents_2020, volume={68}, number={No. 4 (i.a. Special Section on Advances in Electrical Power Engineering)}, journal={Bulletin of the Polish Academy of Sciences Technical Sciences}, pages={645}, howpublished={online}, year={2020}, type={Contents}, title={Contents}, URL={http://journals.pan.pl/Content/117010/PDF/00_645-646_Spis%20tresci_Bpast.No.68-4_27.08.20_.pdf}, }