@ARTICLE{Kaczorek_T._Fractional_2015,
 author={Kaczorek, T.},
 volume={63},
 number={No 3},
 journal={Bulletin of the Polish Academy of Sciences Technical Sciences},
 pages={651-655},
 howpublished={online},
 year={2015},
 title={Fractional descriptor standard and positive discrete-time nonlinear systems},
 URL={http://journals.pan.pl/Content/84295/PDF/11_paper.pdf},
 doi={10.1515/bpasts-2015-0076},
}