@ARTICLE{Ngoc_P.H.A._Robust_2015, author={Ngoc, P.H.A. and Tinh, C.T.}, volume={63}, number={No 4}, journal={Bulletin of the Polish Academy of Sciences Technical Sciences}, pages={947-954}, howpublished={online}, year={2015}, title={Robust stability of positive linear time delay systems under time-varying perturbations}, URL={http://www.journals.pan.pl/Content/84379/PDF/14_paper.pdf}, doi={10.1515/bpasts-2015-0107}, }