@ARTICLE{Kaczorek_Tadeusz_Checking_2011, author={Kaczorek, Tadeusz}, number={No 3}, journal={Archives of Control Sciences}, howpublished={online}, year={2011}, publisher={Committee of Automatic Control and Robotics PAS}, title={Checking of the positivity of descriptor linear systems by the use of the shuffle algorithm}, URL={http://journals.pan.pl/Content/84198/PDF/4.pdf}, doi={10.2478/v10170-010-0044-1}, }