@ARTICLE{Duda_Józef_Lyapunov_2010, author={Duda, Józef}, number={No 1}, journal={Archives of Control Sciences}, howpublished={online}, year={2010}, publisher={Committee of Automatic Control and Robotics PAS}, title={Lyapunov functional for a linear system with two delays both retarded and neutral type}, URL={http://www.journals.pan.pl/Content/84143/PDF/6.pdf}, doi={10.2478/v10170-010-0006-7}, }